Xcode Tips For iOS Security Researchers

Tutorials & Methods
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Reduce Disk Space

  • Note: on your own risk
  1. If don’t do the watchOS related work, delete:
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime
  1. If don’t do the tvOS related work, delete:
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/tvOS.simruntime
  1. If only draw UI by programming, not using storyboard etc, delete(better keep it):
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime
  1. do sim cleaning:
xcrun simctl delete unavailable
  1. delete unused device support files:
~/Library/Developer/Xcode/iOS DeviceSupport
~/Library/Developer/Xcode/watchOS DeviceSupport
  1. delete DerivedData:
~/Library/Developer/Xcode/DerivedData
  1. delete CoreSimulator cache:
~/Library/Developer/CoreSimulator/Caches/dyld

Multiple Versions

If don’t care about the UI of Xcode, you don’t need to install two or more Xcode:

  1. copy the XcodeDefault.xctoolchain from the newer version to
/Applications/Xcode.app/Contents/Developer/Toolchains/

then rename it, and use it later.
2. copy the SDK to:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs
/Applications/Xcode.app/Contents/Developer/Platforms/DriverKit.platform/Developer/SDKs

and choose the sdk in Xcode’s project config pane.
3. copy the DeviceSupport to:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/DeviceSupport
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/DeviceSupport

Enjoy!

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