I've tried everything. Restarted my computer (iMac 2019 Intel i9), I reset the preferences, shut down my computer, and tried it again. Nothing in the Beta 24.1 version but I can see it on the shipping 24.0 version just fine. I can see my monitor in ANY video editing platform including Blackmagic Media Express. I'd like to be able to use the beta version as there are features I've been dreaming of or waiting for that I'd really like to use.