This is exactly my experience and this has to be adressed by Avid asap.
10.1.2 officially supports OSX 10.7.3. Not for everybody though.
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iMac Pro
- MacOS 10.14.6
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- Pro Tools U HDN 2019.6
- Avid HD Omni + HD I/O 8x8x8
- C|24 | S3 | Dock
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