[dominicperry]

Originally Posted by Eric Seaberg

OK, this problem is back and I'm going to let Avid know. I do believe it's an issue with Big Sur 11.5 and later. We received MacPro rack computers which came with Big Sur installed at 11.5. We tried reverting, but since that's how they came we couldn't go back to 11.4.

Anyway, the problem exists UNTIL ProTools boots and the HDX cards wake up. This only happens on our HDX2 system and not on HD Native cards. Once the HDX cards are awake, ProTools can quit and the problem doesn't come back.

Still wondering if anyone else can verify this? The symptom is:

Open any finder window and watch the RED, YELLOW and GREEN buttons in the top-left of the active window. The focus will change in about :05 seconds, for us anyway, and the window will become inactive... buttons dim, then focus returns in another :05 seconds. With multiple windows open, the focus NEVER goes to another window, but simply disables ANY window focus.

This also happens within a browser window. Typing in a web address, if you can't finish typing by the time the focus changes, you're typing nowhere until the focus returns. Again, once ProTools has booted and woken up the HDX cards, it's fine until you reboot the system, then the cycle starts over.

Thanks for reading!

You can install Catalina on a MacPro 2019 so there's no reason you can't go back to Big Sur 11.4 or earlier. You probably will need to do a full install from scratch though.

Dominic