diff --git a/contrib/gitian-descriptors/gitian-osx-bitcoin.yml b/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
new file mode 100644
index 0000000000..aea4b93a1f
--- /dev/null
+++ b/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
@@ -0,0 +1,65 @@
+---
+name: "bitcoin"
+suites:
+- "precise"
+architectures:
+- "i386"
+packages:
+- "git-core"
+- "automake"
+- "faketime"
+- "bsdmainutils"
+- "pkg-config"
+- "p7zip-full"
+
+reference_datetime: "2013-06-01 00:00:00"
+remotes:
+- "url": "https://github.com/bitcoin/bitcoin.git"
+  "dir": "bitcoin"
+files:
+- "osx-native-depends-r2.tar.gz"
+- "osx-depends-r2.tar.gz"
+- "osx-depends-qt-5.2.1-r2.tar.gz"
+- "MacOSX10.6.pkg"
+
+script: |
+
+  echo "a2ccf2299de4e0bb88bd17a3355f02b747575b97492c7c2f5b789a64ccc4cbd6  MacOSX10.6.pkg" | sha256sum -c
+
+  HOST=x86_64-apple-darwin11
+  PREFIX=`pwd`/osx-cross-depends/prefix
+  SDK=`pwd`/osx-cross-depends/SDKs/MacOSX10.6.sdk
+  NATIVEPREFIX=`pwd`/osx-cross-depends/native-prefix
+  export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
+
+  export SOURCES_PATH=`pwd`
+
+  mkdir osx-cross-depends
+
+  cd osx-cross-depends
+  mkdir -p SDKs
+  7z -bd -so -y e ${SOURCES_PATH}/MacOSX10.6.pkg Payload | gzip -d -c | cpio -i
+  cd ..
+
+  tar -C osx-cross-depends -xf osx-native-depends-r2.tar.gz
+  tar -C osx-cross-depends -xf osx-depends-r2.tar.gz
+  tar -C osx-cross-depends -xf osx-depends-qt-5.2.1-r2.tar.gz
+  export PATH=`pwd`/osx-cross-depends/native-prefix/bin:$PATH
+
+  cd bitcoin
+
+  export ZERO_AR_DATE=1
+  export QT_RCC_TEST=1
+  ./autogen.sh
+  ./configure --host=${HOST} --with-boost=${PREFIX} CC=clang CXX=clang++ OBJC=clang OBJCXX=clang++ CFLAGS="-target ${HOST} -mmacosx-version-min=10.6 --sysroot ${SDK} -msse2 -Qunused-arguments" CXXFLAGS="-target ${HOST} -mmacosx-version-min=10.6 --sysroot ${SDK} -msse2 -Qunused-arguments" LDFLAGS="-B${NATIVEPREFIX}/bin -L${PREFIX}/lib -L${SDK}/usr/lib/i686-apple-darwin10/4.2.1" CPPFLAGS="-I${NATIVEPREFIX}/lib/clang/3.2/include -I${PREFIX}/include" SSL_LIBS="-lz -lssl -lcrypto" --disable-tests -with-gui=qt5 PKG_CONFIG_LIBDIR="${PREFIX}/lib/pkgconfig" --disable-dependency-tracking --disable-maintainer-mode
+  make dist
+  mkdir -p distsrc
+  cd distsrc
+  tar --strip-components=1 -xf ../bitcoin-*.tar*
+  ./configure --host=${HOST} --with-boost=${PREFIX} CC=clang CXX=clang++ OBJC=clang OBJCXX=clang++ CFLAGS="-target ${HOST} -mmacosx-version-min=10.6 --sysroot ${SDK} -msse2 -Qunused-arguments" CXXFLAGS="-target ${HOST} -mmacosx-version-min=10.6 --sysroot ${SDK} -msse2 -Qunused-arguments" LDFLAGS="-B${NATIVEPREFIX}/bin -L${PREFIX}/lib -L${SDK}/usr/lib/i686-apple-darwin10/4.2.1" CPPFLAGS="-I${NATIVEPREFIX}/lib/clang/3.2/include -I${PREFIX}/include" SSL_LIBS="-lz -lssl -lcrypto" --disable-tests -with-gui=qt5 PKG_CONFIG_LIBDIR="${PREFIX}/lib/pkgconfig"  --disable-dependency-tracking --disable-maintainer-mode
+  make $MAKEOPTS
+  export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1
+  export FAKETIME=$REFERENCE_DATETIME
+  export TZ=UTC
+  make deploy
+  dmg dmg Bitcoin-Qt.dmg $OUTDIR/Bitcoin-Qt.dmg
diff --git a/contrib/gitian-descriptors/gitian-osx-depends.yml b/contrib/gitian-descriptors/gitian-osx-depends.yml
new file mode 100644
index 0000000000..8e91a30ded
--- /dev/null
+++ b/contrib/gitian-descriptors/gitian-osx-depends.yml
@@ -0,0 +1,160 @@
+---
+name: "osx-depends"
+suites:
+- "precise"
+architectures:
+- "i386"
+packages:
+- "git-core"
+- "automake"
+- "p7zip-full"
+
+reference_datetime: "2013-06-01 00:00:00"
+remotes: []
+files:
+- "boost_1_55_0.tar.bz2"
+- "db-4.8.30.NC.tar.gz"
+- "miniupnpc-1.9.tar.gz"
+- "openssl-1.0.1g.tar.gz"
+- "protobuf-2.5.0.tar.bz2"
+- "qrencode-3.4.3.tar.bz2"
+- "MacOSX10.6.pkg"
+- "osx-native-depends-r2.tar.gz"
+
+script: |
+
+  echo "fff00023dd79486d444c8e29922f4072e1d451fc5a4d2b6075852ead7f2b7b52  boost_1_55_0.tar.bz2" | sha256sum -c
+  echo "12edc0df75bf9abd7f82f821795bcee50f42cb2e5f76a6a281b85732798364ef  db-4.8.30.NC.tar.gz" | sha256sum -c
+  echo "2923e453e880bb949e3d4da9f83dd3cb6f08946d35de0b864d0339cf70934464  miniupnpc-1.9.tar.gz" | sha256sum -c
+  echo "53cb818c3b90e507a8348f4f5eaedb05d8bfe5358aabb508b7263cc670c3e028  openssl-1.0.1g.tar.gz" | sha256sum -c
+  echo "13bfc5ae543cf3aa180ac2485c0bc89495e3ae711fc6fab4f8ffe90dfb4bb677  protobuf-2.5.0.tar.bz2" | sha256sum -c
+  echo "dfd71487513c871bad485806bfd1fdb304dedc84d2b01a8fb8e0940b50597a98  qrencode-3.4.3.tar.bz2" | sha256sum -c
+  echo "a2ccf2299de4e0bb88bd17a3355f02b747575b97492c7c2f5b789a64ccc4cbd6  MacOSX10.6.pkg" | sha256sum -c
+
+  REVISION=r2
+  export SOURCES_PATH=`pwd`
+  export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
+  export PATH=$HOME:$PATH
+  export SOURCES_PATH=`pwd`
+  export ZERO_AR_DATE=1
+
+  mkdir -p osx-cross-depends/build
+  cd osx-cross-depends
+
+  PREFIX=`pwd`/prefix
+  NATIVEPREFIX=`pwd`/native-prefix
+  BUILD_BASE=`pwd`/build
+  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  HOST=x86_64-apple-darwin11
+  MIN_VERSION=10.6
+
+  INT_CFLAGS="-target ${HOST} -mmacosx-version-min=${MIN_VERSION} --sysroot ${SDK} -msse2 -Qunused-arguments"
+  INT_CXXFLAGS="${INT_CFLAGS}"
+  INT_LDFLAGS="-L${PREFIX}/lib -L${SDK}/usr/lib/i686-apple-darwin10/4.2.1"
+  INT_LDFLAGS_CLANG="-B${NATIVEPREFIX}/bin"
+  INT_CPPFLAGS="-I${PREFIX}/include"
+  INT_CC=clang
+  INT_CXX=clang++
+  INT_OBJC=clang
+  INT_OBJCXX=clang++
+  INT_AR=${HOST}-ar
+  INT_RANLIB=${HOST}-ranlib
+  INT_LIBTOOL=${HOST}-libtool
+  INT_INSTALL_NAME_TOOL=${HOST}-install_name_tool
+
+  export PATH=${NATIVEPREFIX}/bin:${PATH}
+
+  mkdir -p ${NATIVEPREFIX}/bin
+  mkdir -p ${NATIVEPREFIX}/lib
+  mkdir -p ${PREFIX}/bin
+  mkdir -p ${PREFIX}/lib
+  mkdir -p ${BUILD_BASE}
+
+  mkdir -p ${SDK}
+  7z -bd -so -y e ${SOURCES_PATH}/MacOSX10.6.pkg Payload | gzip -d -c | cpio -i
+
+  tar xf /home/ubuntu/build/osx-native-depends-r2.tar.gz
+
+  # bdb
+  SOURCE_FILE=${SOURCES_PATH}/db-4.8.30.NC.tar.gz
+  BUILD_DIR=${BUILD_BASE}/db-4.8.30.NC
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  sed -i 's/__atomic_compare_exchange/__atomic_compare_exchange_db/g' ${BUILD_DIR}/dbinc/atomic.h
+  pushd ${BUILD_DIR}
+  cd build_unix;
+  ../dist/configure --host=${HOST} --prefix="${PREFIX}" --disable-shared --enable-cxx CC="${INT_CC}" CXX="${INT_CXX}" AR="${INT_AR}" RANLIB="${INT_RANLIB}" OBJC="${INT_OBJC}" OBJCXX="${INT_OBJCXX}" CFLAGS="${INT_CFLAGS}" CXXFLAGS="${INT_CXXFLAGS}" LDFLAGS="${INT_CLANG_LDFLAGS} ${INT_LDFLAGS}" CPPFLAGS="${INT_CPPFLAGS}"
+  make $MAKEOPTS libdb.a libdb_cxx.a
+  make  install_lib install_include
+  popd
+
+  # openssl
+  SOURCE_FILE=${SOURCES_PATH}/openssl-1.0.1g.tar.gz
+  BUILD_DIR=${BUILD_BASE}/openssl-1.0.1g
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+  sed -ie "s|cc:|${INT_CC}:|" ${BUILD_DIR}/Configure
+  sed -ie "s|\(-arch [_a-zA-Z0-9]*\)|\1 --sysroot ${SDK}  -target ${HOST} -msse2|" ${BUILD_DIR}/Configure
+  AR="${INT_AR}" RANLIB="${INT_RANLIB}" ./Configure --prefix=${PREFIX} --openssldir=${PREFIX}/etc/openssl zlib shared no-krb5 darwin64-x86_64-cc ${INT_LDFLAGS} ${INT_CLANG_LDFLAGS} ${INT_CPPFLAGS}
+  sed -i "s|engines apps test|engines|" ${BUILD_DIR}/Makefile
+  sed -i "/define DATE/d" ${BUILD_DIR}/crypto/Makefile
+  make -j1 build_libs libcrypto.pc libssl.pc openssl.pc
+  make -j1 install_sw
+  popd
+
+  #libminiupnpc
+  SOURCE_FILE=${SOURCES_PATH}/miniupnpc-1.9.tar.gz
+  BUILD_DIR=${BUILD_BASE}/miniupnpc-1.9
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+  CFLAGS="${INT_CFLAGS} ${INT_CPPFLAGS}" make $MAKEOPTS OS=Darwin CC="${INT_CC}" AR="${INT_AR}" libminiupnpc.a
+  install -d ${PREFIX}/include/miniupnpc
+  install *.h ${PREFIX}/include/miniupnpc
+  install libminiupnpc.a  ${PREFIX}/lib
+  popd
+
+  # qrencode
+  SOURCE_FILE=${SOURCES_PATH}/qrencode-3.4.3.tar.bz2
+  BUILD_DIR=${BUILD_BASE}/qrencode-3.4.3
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+
+  # m4 folder is not included in the stable release, which can confuse aclocal
+  # if its timestamp ends up being earlier than configure.ac when extracted
+  touch aclocal.m4
+  ./configure --host=${HOST} --prefix="${PREFIX}" --disable-shared CC="${INT_CC}" CXX="${INT_CXX}" AR="${INT_AR}" RANLIB="${INT_RANLIB}" OBJC="${INT_OBJC}" OBJCXX="${INT_OBJCXX}" CFLAGS="${INT_CFLAGS}" CXXFLAGS="${INT_CXXFLAGS}" LDFLAGS="${INT_CLANG_LDFLAGS} ${INT_LDFLAGS}" CPPFLAGS="${INT_CPPFLAGS}" --disable-shared -without-tools --disable-sdltest --disable-dependency-tracking
+  make $MAKEOPTS
+  make install
+  popd
+
+  # libprotobuf
+  SOURCE_FILE=${SOURCES_PATH}/protobuf-2.5.0.tar.bz2
+  BUILD_DIR=${BUILD_BASE}/protobuf-2.5.0
+
+  tar -C ${BUILD_BASE} -xjf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+  ./configure --host=${HOST} --prefix="${PREFIX}" --disable-shared --enable-cxx CC="${INT_CC}" CXX="${INT_CXX}" AR="${INT_AR}" RANLIB="${INT_RANLIB}" OBJC="${INT_OBJC}" OBJCXX="${INT_OBJCXX}" CFLAGS="${INT_CFLAGS}" CXXFLAGS="${INT_CXXFLAGS}" LDFLAGS="${INT_CLANG_LDFLAGS} ${INT_LDFLAGS}" CPPFLAGS="${INT_CPPFLAGS}" --enable-shared=no --disable-dependency-tracking --with-protoc=${NATIVEPREFIX}/bin/protoc
+  cd src
+  make $MAKEOPTS libprotobuf.la
+  make install-libLTLIBRARIES install-nobase_includeHEADERS
+  cd ..
+  make install-pkgconfigDATA
+  popd
+
+  # boost
+  SOURCE_FILE=${SOURCES_PATH}/boost_1_55_0.tar.bz2
+  BUILD_DIR=${BUILD_BASE}/boost_1_55_0
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+  ./bootstrap.sh --with-libraries=chrono,filesystem,program_options,system,thread,test
+  echo "using darwin : : ${INT_CXX} : <cxxflags>\"${INT_CFLAGS} ${INT_CPPFLAGS}\" <linkflags>\"${INT_LDFLAGS} ${INT_CLANG_LDFLAGS}\" <archiver>\"${INT_LIBTOOL}\" <striper>\"${INT_STRIP}\" : ;" > "user-config.jam"
+  ./b2 -d2 --layout=tagged --build-type=complete --prefix="${PREFIX}" --toolset=darwin-4.2.1 --user-config=user-config.jam variant=release threading=multi link=static install
+  popd
+
+  export GZIP="-9n"
+  find prefix | sort | tar --no-recursion -czf osx-depends-${REVISION}.tar.gz -T -
+
+  mv osx-depends-${REVISION}.tar.gz $OUTDIR
diff --git a/contrib/gitian-descriptors/gitian-osx-native.yml b/contrib/gitian-descriptors/gitian-osx-native.yml
new file mode 100644
index 0000000000..6040e5ac5b
--- /dev/null
+++ b/contrib/gitian-descriptors/gitian-osx-native.yml
@@ -0,0 +1,179 @@
+---
+name: "osx-native"
+suites:
+- "precise"
+architectures:
+- "i386"
+packages:
+- "git-core"
+- "automake"
+- "faketime"
+- "libssl-dev"
+- "libbz2-dev"
+- "libz-dev"
+- "cmake"
+- "libcap-dev"
+- "p7zip-full"
+- "uuid-dev"
+
+reference_datetime: "2013-06-01 00:00:00"
+remotes: []
+files:
+- "10cc648683617cca8bcbeae507888099b41b530c.tar.gz"
+- "cctools-809.tar.gz"
+- "dyld-195.5.tar.gz"
+- "ld64-127.2.tar.gz"
+- "protobuf-2.5.0.tar.bz2"
+- "MacOSX10.6.pkg"
+- "cdrkit-1.1.11.tar.gz"
+- "libdmg-hfsplus-v0.1.tar.gz"
+- "clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz"
+- "cdrkit-deterministic.patch"
+
+
+script: |
+
+  echo "18406961fd4a1ec5c7ea35c91d6a80a2f8bb797a2bd243a610bd75e13eff9aca  10cc648683617cca8bcbeae507888099b41b530c.tar.gz" | sha256sum -c
+  echo "03ba62749b843b131c7304a044a98c6ffacd65b1399b921d69add0375f79d8ad  cctools-809.tar.gz" | sha256sum -c
+  echo "2cf0484c87cf79b606b351a7055a247dae84093ae92c747a74e0cde2c8c8f83c  dyld-195.5.tar.gz" | sha256sum -c
+  echo "97b75547b2bd761306ab3e15ae297f01e7ab9760b922bc657f4ef72e4e052142  ld64-127.2.tar.gz" | sha256sum -c
+  echo "13bfc5ae543cf3aa180ac2485c0bc89495e3ae711fc6fab4f8ffe90dfb4bb677  protobuf-2.5.0.tar.bz2" | sha256sum -c
+  echo "a2ccf2299de4e0bb88bd17a3355f02b747575b97492c7c2f5b789a64ccc4cbd6  MacOSX10.6.pkg" | sha256sum -c
+  echo "d1c030756ecc182defee9fe885638c1785d35a2c2a297b4604c0e0dcc78e47da  cdrkit-1.1.11.tar.gz" | sha256sum -c
+  echo "6569a02eb31c2827080d7d59001869ea14484c281efab0ae7f2b86af5c3120b3  libdmg-hfsplus-v0.1.tar.gz" | sha256sum -c
+  echo "b9d57a88f9514fa1f327a1a703756d0c1c960f4c58494a5bd80313245d13ffff  clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz" | sha256sum -c
+  echo "cc12bdbd7a09f71cb2a6a3e6ec3e0abe885ca7111c2b47857f5095e5980caf4f  cdrkit-deterministic.patch" | sha256sum -c
+
+
+  REVISION=r2
+  export REFERENCE_DATETIME
+  export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
+  export FAKETIME=$REFERENCE_DATETIME
+  export TZ=UTC
+
+  REAL_AR=`which ar`
+  REAL_RANLIB=`which ranlib`
+  REAL_DATE=`which date`
+
+  echo '#!/bin/bash' > $HOME/ar
+  echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> $HOME/ar
+  echo "$REAL_AR \"\$@\"" >> $HOME/ar
+
+  echo '#!/bin/bash' > $HOME/ranlib
+  echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> $HOME/ranlib
+  echo "$REAL_RANLIB \"\$@\"" >> $HOME/ranlib
+
+  echo '#!/bin/bash' > $HOME/date
+  echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> $HOME/date
+  echo "$REAL_DATE \"\$@\"" >> $HOME/date
+
+  chmod +x $HOME/ar $HOME/ranlib $HOME/date
+
+
+  export PATH=$HOME:$PATH
+  export SOURCES_PATH=`pwd`
+
+  mkdir -p osx-cross-depends/build
+  cd osx-cross-depends
+
+  NATIVEPREFIX=`pwd`/native-prefix
+  BUILD_BASE=`pwd`/build
+  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  HOST=x86_64-apple-darwin11
+  MIN_VERSION=10.6
+
+  CFLAGS=""
+  CXXFLAGS="${CFLAGS}"
+  LDFLAGS="-L${NATIVEPREFIX}/lib"
+
+  export PATH=${NATIVEPREFIX}/bin:${PATH}
+
+  mkdir -p ${NATIVEPREFIX}/bin
+  mkdir -p ${NATIVEPREFIX}/lib
+
+  mkdir -p ${SDK}
+  7z -bd -so -y e ${SOURCES_PATH}/MacOSX10.6.pkg Payload | gzip -d -c | cpio -i
+
+  #  Clang
+  SOURCE_FILE=${SOURCES_PATH}/clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
+  BUILD_DIR=${BUILD_BASE}/clang+llvm-3.2-x86-linux-ubuntu-12.04
+
+  mkdir -p ${NATIVEPREFIX}/lib/clang/3.2/include
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  cp ${BUILD_DIR}/bin/clang ${NATIVEPREFIX}/bin/
+  cp ${BUILD_DIR}/bin/clang++ ${NATIVEPREFIX}/bin/
+  cp ${BUILD_DIR}/lib/libLTO.so ${NATIVEPREFIX}/lib/
+  cp ${BUILD_DIR}/lib/clang/3.2/include/* ${NATIVEPREFIX}/lib/clang/3.2/include
+
+  # cctools
+  SOURCE_FILE=${SOURCES_PATH}/10cc648683617cca8bcbeae507888099b41b530c.tar.gz
+  BUILD_DIR=${BUILD_BASE}/toolchain4-10cc648683617cca8bcbeae507888099b41b530c
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  mkdir -p ${BUILD_DIR}/sdks
+  pushd ${BUILD_DIR}/sdks;
+  ln -sf ${SDK} MacOSX10.6.sdk
+  ln -sf ${SOURCES_PATH}/cctools-809.tar.gz ${BUILD_DIR}/cctools2odcctools/cctools-809.tar.gz
+  ln -sf ${SOURCES_PATH}/ld64-127.2.tar.gz ${BUILD_DIR}/cctools2odcctools/ld64-127.2.tar.gz
+  ln -sf ${SOURCES_PATH}/dyld-195.5.tar.gz ${BUILD_DIR}/cctools2odcctools/dyld-195.5.tar.gz
+
+  tar -C ${BUILD_DIR} -xf ${SOURCES_PATH}/clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
+  #   Hack in the use of our llvm headers rather than grabbing the old llvm-gcc.
+  sed -i "s|GCC_DIR|LLVM_CLANG_DIR|g" ${BUILD_DIR}/cctools2odcctools/extract.sh
+  sed -i "s|llvmgcc42-2336.1|clang+llvm-3.2-x86-linux-ubuntu-12.04|g" ${BUILD_DIR}/cctools2odcctools/extract.sh
+  sed -i "s|\${LLVM_CLANG_DIR}/llvmCore/include/llvm-c|\${LLVM_CLANG_DIR}/include/llvm-c \${LLVM_CLANG_DIR}/include/llvm |" ${BUILD_DIR}/cctools2odcctools/extract.sh
+
+  sed -i "s|fAC_INIT|AC_INIT|" ${BUILD_DIR}/cctools2odcctools/files/configure.ac
+  sed -i 's/\# Dynamically linked LTO/\t ;\&\n\t linux*)\n# Dynamically linked LTO/' ${BUILD_DIR}/cctools2odcctools/files/configure.ac
+
+  cd ${BUILD_DIR}/cctools2odcctools
+  ./extract.sh --osxver 10.6
+  cd odcctools-809
+  ./configure --prefix=${NATIVEPREFIX} --target=${HOST} CFLAGS="${CFLAGS} -I${NATIVEPREFIX}/include -D__DARWIN_UNIX03 -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS" LDFLAGS="${LDFLAGS} -Wl,-rpath=\\\$\$ORIGIN/../lib" --with-sysroot=${SDK}
+
+  #   The 'PC' define in sparc/reg.h conflicts but doesn't get used anyway. Just rename it.
+  sed -i "s|define\tPC|define\tPC_|"  ${BUILD_DIR}/cctools2odcctools/odcctools-809/include/architecture/sparc/reg.h
+  make $MAKEOPTS
+  make install
+  popd
+
+  # protoc
+  SOURCE_FILE=${SOURCES_PATH}/protobuf-2.5.0.tar.bz2
+  BUILD_DIR=${BUILD_BASE}/protobuf-2.5.0
+
+  tar -C ${BUILD_BASE} -xjf ${SOURCE_FILE}
+  pushd ${BUILD_DIR};
+  ./configure --enable-shared=no --disable-dependency-tracking --prefix=${NATIVEPREFIX}
+  make $MAKEOPTS
+  cp ${BUILD_DIR}/src/protoc ${NATIVEPREFIX}/bin/
+  popd
+
+  # cdrkit
+  SOURCE_FILE=${SOURCES_PATH}/cdrkit-1.1.11.tar.gz
+  BUILD_DIR=${BUILD_BASE}/cdrkit-1.1.11
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  pushd ${BUILD_DIR}
+  patch -p1 < ${SOURCES_PATH}/cdrkit-deterministic.patch
+  cmake -DCMAKE_INSTALL_PREFIX=${NATIVEPREFIX}
+  make $MAKEOPTS genisoimage
+  make -C genisoimage install
+  popd
+
+  # libdmg-hfsplus
+  SOURCE_FILE=${SOURCES_PATH}/libdmg-hfsplus-v0.1.tar.gz
+  BUILD_DIR=${BUILD_BASE}/libdmg-hfsplus-libdmg-hfsplus-v0.1
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+  mkdir -p ${BUILD_DIR}/build
+  pushd ${BUILD_DIR}/build
+  cmake -DCMAKE_INSTALL_PREFIX:PATH=${NATIVEPREFIX}/bin ..
+  make $MAKEOPTS
+  make install
+  popd
+
+  rm -rf native-prefix/docs
+
+  export GZIP="-9n"
+  find native-prefix | sort | tar --no-recursion -czf osx-native-depends-$REVISION.tar.gz -T -
+  mv osx-native-depends-$REVISION.tar.gz $OUTDIR
diff --git a/contrib/gitian-descriptors/gitian-osx-qt.yml b/contrib/gitian-descriptors/gitian-osx-qt.yml
new file mode 100644
index 0000000000..f55702b025
--- /dev/null
+++ b/contrib/gitian-descriptors/gitian-osx-qt.yml
@@ -0,0 +1,192 @@
+---
+name: "osx-qt"
+suites:
+- "precise"
+architectures:
+- "i386"
+packages:
+- "git-core"
+- "automake"
+- "p7zip-full"
+
+reference_datetime: "2013-06-01 00:00:00"
+remotes: []
+files:
+- "qt-everywhere-opensource-src-5.2.1.tar.gz"
+- "osx-native-depends-r2.tar.gz"
+- "osx-depends-r2.tar.gz"
+- "MacOSX10.6.pkg"
+
+script: |
+
+  echo "84e924181d4ad6db00239d87250cc89868484a14841f77fb85ab1f1dbdcd7da1  qt-everywhere-opensource-src-5.2.1.tar.gz" | sha256sum -c
+  echo "a2ccf2299de4e0bb88bd17a3355f02b747575b97492c7c2f5b789a64ccc4cbd6  MacOSX10.6.pkg" | sha256sum -c
+
+  REVISION=r2
+  export SOURCES_PATH=`pwd`
+  export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
+  export ZERO_AR_DATE=1
+
+  export TZ=UTC
+
+  REAL_DATE=`which date`
+  echo '#!/bin/bash' > $HOME/date
+  echo "$REAL_DATE -d \"${REFERENCE_DATETIME}\" \"\$@\"" >> $HOME/date
+
+  chmod +x $HOME/date
+  export PATH=$HOME:$PATH
+
+  mkdir -p osx-cross-depends/build
+  cd osx-cross-depends
+
+  PREFIX=`pwd`/prefix
+  NATIVEPREFIX=`pwd`/native-prefix
+  BUILD_BASE=`pwd`/build
+  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  HOST=x86_64-apple-darwin11
+  MIN_VERSION=10.6
+
+  INT_CFLAGS="-target ${HOST} -mmacosx-version-min=${MIN_VERSION} --sysroot ${SDK} -msse2 -Qunused-arguments"
+  INT_CXXFLAGS="${INT_CFLAGS}"
+  INT_LDFLAGS="-L${PREFIX}/lib -L${SDK}/usr/lib/i686-apple-darwin10/4.2.1"
+  INT_LDFLAGS_CLANG="-B${NATIVEPREFIX}/bin"
+  INT_CPPFLAGS="-I${PREFIX}/include"
+  INT_CC=clang
+  INT_CXX=clang++
+  INT_OBJC=clang
+  INT_OBJCXX=clang++
+  INT_AR=${HOST}-ar
+  INT_RANLIB=${HOST}-ranlib
+  INT_LIBTOOL=${HOST}-libtool
+  INT_INSTALL_NAME_TOOL=${HOST}-install_name_tool
+
+  export PATH=${NATIVEPREFIX}/bin:${PATH}
+
+  mkdir -p ${NATIVEPREFIX}/bin
+  mkdir -p ${NATIVEPREFIX}/lib
+  mkdir -p ${PREFIX}/bin
+  mkdir -p ${PREFIX}/lib
+  mkdir -p ${BUILD_BASE}
+
+  mkdir -p ${SDK}
+  7z -bd -so -y e ${SOURCES_PATH}/MacOSX10.6.pkg Payload | gzip -d -c | cpio -i
+
+  tar xf /home/ubuntu/build/osx-native-depends-r2.tar.gz
+
+
+  mkdir -p SDKs
+  7z -bd -so -y e ${SOURCES_PATH}/MacOSX10.6.pkg Payload | gzip -d -c | cpio -i
+
+  tar xf /home/ubuntu/build/osx-native-depends-r2.tar.gz
+  export PATH=`pwd`/native-prefix/bin:$PATH
+  tar xf /home/ubuntu/build/osx-depends-r2.tar.gz
+
+  SOURCE_FILE=${SOURCES_PATH}/qt-everywhere-opensource-src-5.2.1.tar.gz
+  BUILD_DIR=${BUILD_BASE}/qt-everywhere-opensource-src-5.2.1
+
+
+  tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
+
+  # Install our mkspec. All files are pulled from the macx-clang spec, except for
+  # our custom qmake.conf
+  SPECFILE=${BUILD_DIR}/qtbase/mkspecs/macx-clang-linux/qmake.conf
+
+  mkdir -p ${BUILD_DIR}/qtbase/mkspecs/macx-clang-linux
+  cp -f ${BUILD_DIR}/qtbase/mkspecs/macx-clang/Info.plist.lib ${BUILD_DIR}/qtbase/mkspecs/macx-clang-linux/
+  cp -f ${BUILD_DIR}/qtbase/mkspecs/macx-clang/Info.plist.app ${BUILD_DIR}/qtbase/mkspecs/macx-clang-linux/
+  cp -f ${BUILD_DIR}/qtbase/mkspecs/macx-clang/qplatformdefs.h ${BUILD_DIR}/qtbase/mkspecs/macx-clang-linux/
+
+  cat > ${SPECFILE} <<ENDCONF
+
+  MAKEFILE_GENERATOR      = UNIX
+  CONFIG                 += app_bundle incremental global_init_link_order lib_version_first plugin_no_soname absolute_library_soname
+  QMAKE_INCREMENTAL_STYLE = sublib
+
+  include(../common/macx.conf)
+  include(../common/gcc-base-mac.conf)
+  include(../common/clang.conf)
+  include(../common/clang-mac.conf)
+
+  QMAKE_XCODE_VERSION=4.3
+  QMAKE_XCODE_DEVELOPER_PATH=/Developer
+
+  QMAKE_MACOSX_DEPLOYMENT_TARGET = ${MIN_VERSION}
+
+  QMAKE_MAC_SDK=macosx
+  QMAKE_MAC_SDK.macosx.path = ${SDK}
+  QMAKE_MAC_SDK.macosx.platform_name = macosx
+  QMAKE_MAC_SDK_PATH=${SDK}
+
+  QMAKE_CFLAGS += -target ${HOST}
+  QMAKE_OBJECTIVE_CFLAGS += -target ${HOST}
+  QMAKE_CXXFLAGS += -target ${HOST}
+
+  QMAKE_LFLAGS += -target ${HOST}
+  QMAKE_AR = ${HOST}-ar cq
+  QMAKE_RANLIB=${HOST}-ranlib
+  QMAKE_LIBTOOL=${HOST}-libtool
+  QMAKE_INSTALL_NAME_TOOL=${HOST}-install_name_tool
+
+  load(qt_config)
+
+  ENDCONF
+
+  pushd ${BUILD_DIR}
+  ./configure -release -opensource -openssl-linked \
+  -no-audio-backend  -no-javascript-jit -no-sql-sqlite -no-sql-tds \
+  -no-cups -no-iconv -no-dbus -no-gif -no-audio-backend -no-freetype \
+  -no-javascript-jit -no-sql-sqlite -no-nis -no-cups -no-iconv -no-pch \
+  -no-dbus -no-gif -no-sm -nomake examples -no-feature-style-plastique \
+  -no-xcb -no-qml-debug -no-pch -no-nis \
+  -no-feature-style-cde -no-feature-style-s60 -no-feature-style-motif \
+  -no-feature-style-windowsmobile -no-feature-style-windowsce \
+  -no-feature-style-cleanlooks \
+  -no-sql-db2 -no-sql-ibase -no-sql-oci -no-sql-tds -no-sql-mysql \
+  -no-sql-odbc -no-sql-psql -no-sql-sqlite -no-sql-sqlite2 \
+  -skip qtsvg -skip qtwebkit -skip qtwebkit-examples -skip qtserialport \
+  -skip qtdeclarative -skip qtmultimedia -skip qtimageformats \
+  -skip qtlocation -skip qtsensors -skip qtquick1 -skip qtxmlpatterns \
+  -skip qtquickcontrols -skip qtactiveqt -skip qtconnectivity \
+  -skip qtwinextras -skip qtscript \
+  -prefix ${PREFIX} -bindir ${NATIVEPREFIX}/bin \
+  -confirm-license -xplatform macx-clang-linux -v ${INT_LDFLAGS}
+
+  # RCC's output is sorted using each file entry's hash as the key. Unfortunately,
+  # the hash function uses a random seed for each run so the results aren't
+  # deterministic. This leads to static resources being defined in a random order,
+  # which in-turn means that object files are not predictable.
+  # Fortunately, this upsets Qt's unit tests as well, so they've added the
+  # QT_RCC_TEST environment variable to set a pre-defined seed. Here, do the same
+  # thing for the same reason.
+  QT_RCC_TEST=1 make $MAKEOPTS module-qtbase-make_first
+
+
+  make $MAKEOPTS module-qttranslations-make_first
+  make $MAKEOPTS module-qttools-make_first
+  make $MAKEOPTS -C qtbase
+  make -C qtbase install
+  make -C qttranslations install
+  make -C qttools/src/linguist install
+  popd
+
+  # This file should not be installed to the destination. It's native and
+  # non-deterministic. Remove it.
+  # See: https://bugreports.qt-project.org/browse/QTBUG-31393
+  rm -f ${PREFIX}/lib/libQt5Bootstrap.a
+
+  rm -f ${PREFIX}/lib/Qt*.framework/Qt*.prl
+  pushd ${PREFIX}/include
+  ln -sf ../lib/QtNetwork.framework/Headers/ QtNetwork
+  ln -sf ../lib/QtWidgets.framework/Headers/ QtWidgets
+  ln -sf ../lib/QtGui.framework/Headers/ QtGui
+  ln -sf ../lib/QtCore.framework/Headers/ QtCore
+  ln -sf ../lib/QtTest.framework/Headers/ QtTest
+  popd
+
+  rm -f ${PREFIX}/lib/*.la
+  find ${PREFIX}/lib -name "*.prl" -delete
+
+  export GZIP="-9n"
+  find native-prefix prefix | sort | tar --no-recursion -czf osx-depends-qt-5.2.1-${REVISION}.tar.gz -T -
+
+  mv osx-depends-qt-5.2.1-${REVISION}.tar.gz $OUTDIR
diff --git a/doc/README_osx.txt b/doc/README_osx.txt
new file mode 100644
index 0000000000..6eae4f5cf1
--- /dev/null
+++ b/doc/README_osx.txt
@@ -0,0 +1,71 @@
+Deterministic OSX Dmg Notes.
+
+Working OSX DMG's are created in Linux by combining a recent clang,
+the Apple's binutils (ld, ar, etc), and DMG authoring tools.
+
+Apple uses clang extensively for development and has upstreamed the necessary
+functionality so that a vanilla clang can take advantage. It supports the use
+of -F, -target, -mmacosx-version-min, and --sysroot, which are all necessary
+when building for OSX. A pre-compiled version of 3.2 is used because it was not
+available in the Precise repositories at the time this work was started. In the
+future, it can be switched to use system packages instead.
+
+Apple's version of binutils (called cctools) contains lots of functionality
+missing in the FSF's binutils. In addition to extra linker options for
+frameworks and sysroots, several other tools are needed as well such as
+install_name_tool, lipo, and nmedit. These do not build under linux, so they
+have been patched to do so. The work here was used as a starting point:
+https://github.com/mingwandroid/toolchain4
+
+In order to build a working toolchain, the following source packages are needed
+from Apple: cctools, dyld, and ld64.
+
+Beware. This part is ugly. Very very very ugly. In the future, this should be
+broken out into a new repository and cleaned up. Additionally, the binaries
+only work when built as x86 and not x86_64. This is an especially nasty
+limitation because it must be linked with the toolchain's libLTO.so, meaning
+that the entire toolchain must be x86. Gitian x86_64 should not be used until
+this has been fixed, because it would mean that several native dependencies
+(openssl, libuuid, etc) would need to be built as x86 first.
+
+These tools inject timestamps by default, which produce non-deterministic
+binaries. The ZERO_AR_DATE environment variable is used to disable that.
+
+This version of cctools has been patched to use the current version of clang's
+headers and and its libLTO.so rather than those from llvmgcc, as it was
+originally done in toolchain4.
+
+To complicate things further, all builds must target an Apple SDK. These SDKs
+are free to download, but not redistributable.
+To obtain it, register for a developer account, then download xcode_3.2.6_and_ios_sdk_4.3.dmg:
+https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/xcode_3.2.6_and_ios_sdk_4.3__final/xcode_3.2.6_and_ios_sdk_4.3.dmg
+This file is several gigabytes in size, but only a single .pkg file inside is
+needed (MacOSX10.6.pkg). From Linux, 7-zip can be used to extract this file.
+The DMG can then be discarded.
+
+The gitian descriptors build 2 sets of files: Linux tools, then Apple binaries
+which are created using these tools. The build process has been designed to
+avoid including the SDK's files in Gitian's outputs. All interim tarballs are
+fully deterministic and may be freely redistributed.
+
+genisoimage is used to create the initial DMG. It is not deterministic as-is,
+so it has been patched. A system genisoimage will work fine, but it will not
+be deterministic because the file-order will change between invocations.
+The patch can be seen here:
+https://raw.githubusercontent.com/theuni/osx-cross-depends/master/patches/cdrtools/genisoimage.diff
+No effort was made to fix this cleanly, so it likely leaks memory badly. But
+it's only used for a single invocation, so that's no real concern.
+
+genisoimage cannot compress DMGs, so afterwards, the 'dmg' tool from the
+libdmg-hfsplus project is used to compress it. There are several bugs in this
+tool and its maintainer has seemingly abandoned the project. It has been forked
+and is available (with fixes) here: https://github.com/theuni/libdmg-hfsplus .
+
+The 'dmg' tool has the ability to create DMG's from scratch as well, but this
+functionality is broken. Only the compression feature is currently used.
+Ideally, the creation could be fixed and genisoimage would no longer be necessary.
+
+Background images and other features can be added to DMG files by inserting a
+.DS_Store before creation. The easiest way to create this file is to build a
+DMG without one, move it to a device running OSX, customize the layout, then
+grab the .DS_Store file for later use. That is the approach taken here.
diff --git a/doc/release-process.md b/doc/release-process.md
index b93c163748..b12479516b 100644
--- a/doc/release-process.md
+++ b/doc/release-process.md
@@ -33,10 +33,18 @@ Release Process
 	git checkout v${VERSION}
 	popd
 	pushd ./gitian-builder
+        mkdir -p inputs; cd inputs/
+
+ Register and download the Apple SDK (see OSX Readme for details)
+        visit https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/xcode_3.2.6_and_ios_sdk_4.3__final/xcode_3.2.6_and_ios_sdk_4.3.dmg
+
+ Extract MacOSX10.6.pkg using 7zip
+        7z e -y xcode_3.2.6_and_ios_sdk_4.3.dmg 5.hfs
+        7z -y e 5.hfs "Xcode and iOS SDK/Packages/MacOSX10.6.pkg"
+        rm 5.hfs
 
  Fetch and build inputs: (first time, or when dependency versions change)
 
-	mkdir -p inputs; cd inputs/
 	wget 'http://miniupnp.free.fr/files/download.php?file=miniupnpc-1.9.tar.gz' -O miniupnpc-1.9.tar.gz
 	wget 'https://www.openssl.org/source/openssl-1.0.1g.tar.gz'
 	wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'
@@ -49,6 +57,16 @@ Release Process
 	wget 'https://download.qt-project.org/official_releases/qt/5.2/5.2.0/single/qt-everywhere-opensource-src-5.2.0.tar.gz'
 	wget 'https://download.qt-project.org/archive/qt/4.6/qt-everywhere-opensource-src-4.6.4.tar.gz'
 	wget 'https://protobuf.googlecode.com/files/protobuf-2.5.0.tar.bz2'
+	wget 'https://github.com/mingwandroid/toolchain4/archive/10cc648683617cca8bcbeae507888099b41b530c.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/cctools/cctools-809.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/dyld/dyld-195.5.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/ld64/ld64-127.2.tar.gz'
+	wget 'http://cdrkit.org/releases/cdrkit-1.1.11.tar.gz'
+	wget 'https://github.com/theuni/libdmg-hfsplus/archive/libdmg-hfsplus-v0.1.tar.gz'
+	wget 'http://llvm.org/releases/3.2/clang+llvm-3.2-x86-linux-ubuntu-12.04.tar.gz' -O \
+	     clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
+        wget 'https://raw.githubusercontent.com/theuni/osx-cross-depends/master/patches/cdrtools/genisoimage.diff' -O \
+	     cdrkit-deterministic.patch
 	cd ..
 	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/boost-linux.yml
 	mv build/out/boost-*.zip inputs/
@@ -64,6 +82,12 @@ Release Process
 	mv build/out/qt-*.zip inputs/
 	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/protobuf-win.yml
 	mv build/out/protobuf-*.zip inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-native.yml
+	mv build/out/osx-*.tar.gz inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-depends.yml
+	mv build/out/osx-*.tar.gz inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-qt.yml
+	mv build/out/osx-*.tar.gz inputs/
 
  The expected SHA256 hashes of the intermediate inputs are:
 
@@ -96,13 +120,19 @@ Release Process
 	zip -r bitcoin-${VERSION}-win-gitian.zip *
 	mv bitcoin-${VERSION}-win-gitian.zip ../../../
 	popd
+        ./bin/gbuild --commit bitcoin=v${VERSION} ../bitcoin/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
+        ./bin/gsign --signer $SIGNER --release ${VERSION}-osx --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
+	pushd build/out
+	mv Bitcoin-Qt.dmg ../../../
+	popd
 	popd
 
   Build output expected:
 
   1. linux 32-bit and 64-bit binaries + source (bitcoin-${VERSION}-linux-gitian.zip)
   2. windows 32-bit and 64-bit binaries + installer + source (bitcoin-${VERSION}-win-gitian.zip)
-  3. Gitian signatures (in gitian.sigs/${VERSION}[-win]/(your gitian key)/
+  3. OSX installer (Bitcoin-Qt.dmg)
+  4. Gitian signatures (in gitian.sigs/${VERSION}[-win|-osx]/(your gitian key)/
 
 repackage gitian builds for release as stand-alone zip/tar/installer exe
 
@@ -119,21 +149,6 @@ repackage gitian builds for release as stand-alone zip/tar/installer exe
 	zip -r bitcoin-${VERSION}-win.zip bitcoin-${VERSION}-win
 	rm -rf bitcoin-${VERSION}-win
 
-**Perform Mac build:**
-
-  OSX binaries are created by Gavin Andresen on a 64-bit, OSX 10.6 machine.
-
-	./autogen.sh
-        SDK=$(xcode-select --print-path)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk
-        CXXFLAGS="-mmacosx-version-min=10.6 -isysroot $SDK" ./configure --enable-upnp-default
-	make
-	export QTDIR=/opt/local/share/qt4  # needed to find translations/qt_*.qm files
-	T=$(contrib/qt_translations.py $QTDIR/translations src/qt/locale)
-        export CODESIGNARGS='--keychain ...path_to_keychain --sign "Developer ID Application: BITCOIN FOUNDATION, INC., THE"'
-	python2.7 contrib/macdeploy/macdeployqtplus Bitcoin-Qt.app -sign -add-qt-tr $T -dmg -fancy contrib/macdeploy/fancy.plist
-
- Build output expected: Bitcoin-Qt.dmg
-
 ###Next steps:
 
 * Code-sign Windows -setup.exe (in a Windows virtual machine using signtool)