I've had a series of issues since upgrading, I believe it is BT related:
If I do NOT try to use my previously functioning BT headphones I get:
- no stalls/stops playing video files
- no sound issues (no connect to headphones, stuttering audio)
- no endlessly spinning beachball
- no "System Prefs Not Responding" message
If I try to connect to the headphones I have issues with all of the above bullets. Trackpad and keyboard continue to work after the above problems manifest themselves.
This bug is repeatable - don't connect to the BT headphones, things are "good"
Disk Utility found no issues
RePairing the headphones does not help
I rest the PRAM last night, and the problem went away completely, everything worked. Put the machine in Sleep, went to bed, woke up, problem was back.
The BT menu think the headphones still Connected, they are NOT in the Sound Prefs (were when working), At this point the Sound Prefs won't close, and all I get again is the beach ball that spins endlessly (30 minutes).
I don't know if this is a BT issue, a Sound Prefs issue, or what, but again this morning I am broken.