com.apple.xbs how to install?

2017-03-23 22:50:20.703 Python[94924:2805073] *** Assertion failure in -[NSBitmapImageRep initWithCGImage:], /Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1504.81.100/AppKit.subproj/NSBitmapImageRep.m:1296
2017-03-23 22:50:20.734 Python[94924:2805073] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: cgImage != NULL'



Error on PyQt5 Python 3 Mac OS script. How do I download this /Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1504.81.100/AppKit.subproj/NSBitmapImageRep.m:1296?


Or more generally /Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1504.81.100/AppKit.subproj/ ?


Thanks!

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