Mac: No Midi I/O PortAudio, No Synthesizer, No Playback

Problem: Synthesizer and Mixer are greyed out, playback is greyed out, and external midi doesn't work for entering notes, can't play using internal midi sounds either.

I'm running MacOS 11.6.2 (Big Sur) and MuseScore 3.6.2
From About MuseScore: OS: macOS 10.16, Arch.: x86_64, MuseScore version (64-bit): 3.6.2.548020600, revision: 3224f34

MuseScore Preferences -> I/O, port audio is selected, but there is nothing in any of the dropdowns.

I've reviewed this article: https://musescore.org/en/node/301796

I have done a musescore factory reset, reinstallation, and deleted the .plist files per these other articles (even the advanced reset), as well as safe mode boot and restart.
https://musescore.org/en/node/96811
https://musescore.org/en/handbook/3/revert-factory-settings

Starting MuseScore from the command line shows the following:

steve@SMBP16 ~ % /Applications/MuseScore\ 3.app/Contents/MacOS/mscore
dlopen error : dlopen(libjack.0.dylib, 1): image not found
dlopen error : dlopen(/usr/local/lib/libjack.0.dylib, 1): image not found
No device selected. PortAudio detected 3 devices. Will use the default device (index 1).
||PaMacCore (AUHAL)|| Failed to open AUHAL component.||PaMacCore (AUHAL)|| Error on line 1263: err='-50', msg=Unknown Error
||PaMacCore (AUHAL)|| Failed to open AUHAL component.||PaMacCore (AUHAL)|| Error on line 1263: err='-50', msg=Unknown Error
Portaudio open stream 1 failed: Internal PortAudio error
init PortAudio failed
Portaudio close stream failed: Invalid stream pointer
no audio driver found
ZoomBox::setLogicalZoom(): Formatting logical zoom level as 100% (rounded from 1.000000)
Cannot start I/O
sequencer init failed

I have also downloaded the latest PortAudio, compiled and installed:
http://files.portaudio.com/docs/v19-doxydocs/compile_mac_coreaudio.html

Still no PortAudio options.

Internal and External Midi instruments works just fine with Logic Pro, and I see external midi data using Midi Monitor.

Any ideas? Thanks!