Attempts to build Python 2.7 using OS X/macOS public beta versions of the latest command-line tools can fail due to the removal of the system header file for QuickTime/QuickTime.h, one of the long deprecated Carbon APIs.  Currently, Python only attempts to build modules dependent on this file when building for 32-bit archs so this problem typically only affects builds with --with-universal-archs= configure options like "intel" or "intel-32".  It would be nice to preserve the ability to make use of QuickTime on older systems where the header file is still available.  Since the old Python mac modules don't exist in Python 3.x, this is only a 2.7 issue.