Xcode Tips for iOS Security Researcher

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
   

2. If don’t do the tvOS related work, delete:

   /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/tvOS.simruntime
   

3. 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
   

4. do sim cleaning:

   xcrun simctl delete unavailable
   

5. delete unused device support files:

   ~/Library/Developer/Xcode/iOS DeviceSupport
   ~/Library/Developer/Xcode/watchOS DeviceSupport
   

6. delete DerivedData:

   ~/Library/Developer/Xcode/DerivedData
   

7. 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