Hope it’s okay to post this here as though it affects GP I believe its a MacOS issue, not GP.
After a recent OS update (to the latest Ventura) it seems that the first app that uses MIDI to launch after system startup takes 60+ seconds with the spinning coloured ball before finally launching, after which all seems to work fine. Any subsequent MIDI apps launch as expected and I’ve not observed any unusual behaviour wrt MIDI otherwise. Non MIDI using apps launch normally.
This happens regardless if the first app is GP, MidiPipe, MIDI Monitor or Apple’s Audio MIDI Setup.
I’m not MacOS savvy enough to know how to investigate this further so thought I’d check the GP community to see if anyone else has experienced this or has some troubleshooting tips.
FWIW I’m on a 2019 16in MBP with a 2.4GHz 8-core Intel core I9 with 32 G RAM running Ventura 13.6.3
Doesn’t seem to make a difference. Still about 60 seconds for the first MIDI app to complete launching. FWIW I’ve never had to use the IAC driver and didn’t have any ports set up as in your image.
Sorry for the delay… same thing with a new user. Apple’s Audio MIDI Setup launched immediately into the audio pane but when I opened the MIDI window it took a minute of coloured spinning ball before it appeared.
