I have an M4 MacBook Pro - ioquake3 has run great for - well always - but I just upgraded to macOS Tahoe 26 and there is no in game sound. Also when moving around the menus the click/dink sound is not there. The only sound that plays is the opening stamping.
Again, sound has been no issue forever - only change is going to Tahoe.
This works. There does seem to be some sound “artifacts” in the background - but not too bad. Like a clicking/popping.
One thing I do notice, the game gets jumpier and jumpier the longer one is in an arena. Use to be very smooth. Now it is struggling a bit and starts getting jumpy after just a few minutes. So maybe more is going on than just sound.
Switching from opengl2 to opengl1 seems to help. It is subjective. I felt like the performance was better. I don’t recall any jumpiness before macOS 26… but again, maybe I am being sensitive to change.