I noticed that there are numerous missing source repositories. For instance:
https://github.com/apple-oss-distributions/IOHIDFamily/blob/07b14847cb5b4e0f826a3970961624969e443a6e/IOHIDFamily.xcodeproj/project.pbxproj#L4274
Many files referenced in the xcodeproj are listed but do not actually exist in the repositories.
AkiSakurai
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This status is essential for generating simulated CGEvents. Games often use this API to implement cursor lock. If we send CGEvents with a moving position, it's possible for the cursor to move outside the game window and cause the game window to become inactive. If we don't send CGEvents with updated positions, we can only control the mouse within the game but not in other windows or the desktop.