Yesterday it was still able to submit iOS App normally, but today it is not allowed because of this. I not import AVFCapture/AVFCore fmwk, and _CMTimebaseCreateWithMasterClock isn't non-public. ITMS-90338: Non-public API usage - The app references non-public symbols in Frameworks/libksygpulive.framework/libksygpulive: _CMTimebaseCreateWithMasterClock,The app links to non-public libraries in zhibo: /System/Library/PrivateFrameworks/AVFCapture.framework/AVFCapture, /System/Library/PrivateFrameworks/AVFCore.framework/AVFCore. If method names in your source code match the private Apple APIs listed above, altering your method names will help prevent this app from being flagged in future submissions. In addition, note that one or more of the above APIs may be located in a static library that was included with your app. If so, they must be removed. For further information, visit the Technical Support Information at http://developer.apple.com/support/technical/ etc._CMTimebaseCreateWithMasterClock -… | Apple Developer Forums