diff --git a/contrib/gitian-descriptors/gitian-osx-bitcoin.yml b/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
index aea4b93a1..e29047d61 100644
--- a/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
+++ b/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
@@ -17,33 +17,28 @@ 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"
+- "osx-native-depends-r3.tar.gz"
+- "osx-depends-r3.tar.gz"
+- "osx-depends-qt-5.2.1-r3.tar.gz"
+- "MacOSX10.7.sdk.tar.gz"
 
 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
+  SDK=`pwd`/osx-cross-depends/SDKs/MacOSX10.7.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
+  mkdir -p osx-cross-depends/SDKs
 
-  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/SDKs -xf ${SOURCES_PATH}/MacOSX10.7.sdk.tar.gz
 
-  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
+  tar -C osx-cross-depends -xf osx-native-depends-r3.tar.gz
+  tar -C osx-cross-depends -xf osx-depends-r3.tar.gz
+  tar -C osx-cross-depends -xf osx-depends-qt-5.2.1-r3.tar.gz
   export PATH=`pwd`/osx-cross-depends/native-prefix/bin:$PATH
 
   cd bitcoin
diff --git a/contrib/gitian-descriptors/gitian-osx-depends.yml b/contrib/gitian-descriptors/gitian-osx-depends.yml
index 8e91a30de..adc86e5cb 100644
--- a/contrib/gitian-descriptors/gitian-osx-depends.yml
+++ b/contrib/gitian-descriptors/gitian-osx-depends.yml
@@ -18,8 +18,8 @@ files:
 - "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"
+- "MacOSX10.7.sdk.tar.gz"
+- "osx-native-depends-r3.tar.gz"
 
 script: |
 
@@ -29,9 +29,8 @@ script: |
   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
+  REVISION=r3
   export SOURCES_PATH=`pwd`
   export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export PATH=$HOME:$PATH
@@ -44,7 +43,7 @@ script: |
   PREFIX=`pwd`/prefix
   NATIVEPREFIX=`pwd`/native-prefix
   BUILD_BASE=`pwd`/build
-  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  SDK=`pwd`/SDKs/MacOSX10.7.sdk
   HOST=x86_64-apple-darwin11
   MIN_VERSION=10.6
 
@@ -70,10 +69,10 @@ script: |
   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
+  mkdir -p SDKs
+  tar -C SDKs -xf ${SOURCES_PATH}/MacOSX10.7.sdk.tar.gz
 
-  tar xf /home/ubuntu/build/osx-native-depends-r2.tar.gz
+  tar xf /home/ubuntu/build/osx-native-depends-r3.tar.gz
 
   # bdb
   SOURCE_FILE=${SOURCES_PATH}/db-4.8.30.NC.tar.gz
diff --git a/contrib/gitian-descriptors/gitian-osx-native.yml b/contrib/gitian-descriptors/gitian-osx-native.yml
index 6040e5ac5..a753ad704 100644
--- a/contrib/gitian-descriptors/gitian-osx-native.yml
+++ b/contrib/gitian-descriptors/gitian-osx-native.yml
@@ -24,7 +24,7 @@ files:
 - "dyld-195.5.tar.gz"
 - "ld64-127.2.tar.gz"
 - "protobuf-2.5.0.tar.bz2"
-- "MacOSX10.6.pkg"
+- "MacOSX10.7.sdk.tar.gz"
 - "cdrkit-1.1.11.tar.gz"
 - "libdmg-hfsplus-v0.1.tar.gz"
 - "clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz"
@@ -38,14 +38,13 @@ script: |
   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
+  REVISION=r3
   export REFERENCE_DATETIME
   export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export FAKETIME=$REFERENCE_DATETIME
@@ -78,7 +77,7 @@ script: |
 
   NATIVEPREFIX=`pwd`/native-prefix
   BUILD_BASE=`pwd`/build
-  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  SDK=`pwd`/SDKs/MacOSX10.7.sdk
   HOST=x86_64-apple-darwin11
   MIN_VERSION=10.6
 
@@ -91,8 +90,8 @@ script: |
   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
+  mkdir -p SDKs
+  tar -C SDKs -xf ${SOURCES_PATH}/MacOSX10.7.sdk.tar.gz
 
   #  Clang
   SOURCE_FILE=${SOURCES_PATH}/clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
@@ -112,7 +111,7 @@ script: |
   tar -C ${BUILD_BASE} -xf ${SOURCE_FILE}
   mkdir -p ${BUILD_DIR}/sdks
   pushd ${BUILD_DIR}/sdks;
-  ln -sf ${SDK} MacOSX10.6.sdk
+  ln -sf ${SDK} MacOSX10.7.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
@@ -127,7 +126,7 @@ script: |
   sed -i 's/\# Dynamically linked LTO/\t ;\&\n\t linux*)\n# Dynamically linked LTO/' ${BUILD_DIR}/cctools2odcctools/files/configure.ac
 
   cd ${BUILD_DIR}/cctools2odcctools
-  ./extract.sh --osxver 10.6
+  ./extract.sh --osxver 10.7
   cd odcctools-809
   ./configure --prefix=${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}
 
diff --git a/contrib/gitian-descriptors/gitian-osx-qt.yml b/contrib/gitian-descriptors/gitian-osx-qt.yml
index d0be016e6..b57908dbd 100644
--- a/contrib/gitian-descriptors/gitian-osx-qt.yml
+++ b/contrib/gitian-descriptors/gitian-osx-qt.yml
@@ -13,16 +13,15 @@ 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"
+- "osx-native-depends-r3.tar.gz"
+- "osx-depends-r3.tar.gz"
+- "MacOSX10.7.sdk.tar.gz"
 
 script: |
 
   echo "84e924181d4ad6db00239d87250cc89868484a14841f77fb85ab1f1dbdcd7da1  qt-everywhere-opensource-src-5.2.1.tar.gz" | sha256sum -c
-  echo "a2ccf2299de4e0bb88bd17a3355f02b747575b97492c7c2f5b789a64ccc4cbd6  MacOSX10.6.pkg" | sha256sum -c
 
-  REVISION=r2
+  REVISION=r3
   export SOURCES_PATH=`pwd`
   export TAR_OPTIONS="-m --mtime="$REFERENCE_DATE\\\ $REFERENCE_TIME""
   export ZERO_AR_DATE=1
@@ -42,7 +41,7 @@ script: |
   PREFIX=`pwd`/prefix
   NATIVEPREFIX=`pwd`/native-prefix
   BUILD_BASE=`pwd`/build
-  SDK=`pwd`/SDKs/MacOSX10.6.sdk
+  SDK=`pwd`/SDKs/MacOSX10.7.sdk
   HOST=x86_64-apple-darwin11
   MIN_VERSION=10.6
 
@@ -68,18 +67,13 @@ script: |
   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 -C SDKs -xf ${SOURCES_PATH}/MacOSX10.7.sdk.tar.gz
+
+  tar xf /home/ubuntu/build/osx-native-depends-r3.tar.gz
 
-  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
+  tar xf /home/ubuntu/build/osx-depends-r3.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
diff --git a/doc/README_osx.txt b/doc/README_osx.txt
index 6eae4f5cf..2be56c159 100644
--- a/doc/README_osx.txt
+++ b/doc/README_osx.txt
@@ -37,11 +37,15 @@ 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.
+To obtain it, register for a developer account, then download xcode4630916281a.dmg:
+https://developer.apple.com/downloads/download.action?path=Developer_Tools/xcode_4.6.3/xcode4630916281a.dmg
+This file is several gigabytes in size, but only a single directory inside is
+needed: Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk
+
+Unfortunately, the usual linux tools (7zip, hpmount, loopback mount) are incapable of opening this file.
+To create a tarball suitable for gitian input, mount the dmg in OSX, then create it with:
+  $ tar -C /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ -czf MacOSX10.7.sdk.tar.gz MacOSX10.7.sdk
+
 
 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
diff --git a/doc/release-process.md b/doc/release-process.md
index be00cb809..6d08c4849 100644
--- a/doc/release-process.md
+++ b/doc/release-process.md
@@ -36,12 +36,10 @@ Release Process
         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
+	visit https://developer.apple.com/downloads/download.action?path=Developer_Tools/xcode_4.6.3/xcode4630916281a.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
+ Using a Mac, create a tarball for the 10.7 SDK
+	tar -C /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ -czf MacOSX10.7.sdk.tar.gz MacOSX10.7.sdk
 
  Fetch and build inputs: (first time, or when dependency versions change)