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Gitian building Mac OS SDK

On the host machine, register for a free Apple developer account, then download the SDK here.

MacOS host

Using Mac OS X, you can mount the dmg, and then extract the SDK with:

  $ hdiutil attach Xcode_7.3.1.dmg
  $ tar -C /Volumes/Xcode/ -czf MacOSX10.11.sdk.tar.gz MacOSX10.11.sdk

Clean up the files you don't need:

diskutil unmount /Volumes/Xcode
rm MacOSX10.11.sdk.tar.gz Xcode_7.3.1.dmg

Non-MacOS host:

Alternatively, you can use 7zip and SleuthKit to extract the files one by one. The script automates this. First ensure the dmg file is in the current directory, and then run the script.

You may wish to delete the intermediate 5.hfs file and MacOSX10.11.sdk (the directory) when you've confirmed the extraction succeeded.

apt-get install p7zip-full sleuthkit
rm -rf 5.hfs MacOSX10.11.sdk

Copy SDK to Gitian VM:

Copy it to the Gitian VM, e.g.:

scp MacOSX10.11.sdk.tar.gz gitian:

Login to the VM and:

mkdir gitian-builder/inputs
mv MacOSX10.11.sdk.tar.gz gitian-builder/inputs


See for troubleshooting tips.