Figured out how to get streaming from my MacPro to my TV working (via Amazon Firestick) from Youtube. Had to install a third party app on the Firestick and basically ignore the app's own instructions. But it's working. For YT at least. My Airplay Mirroring on the Mac itself does not seem to see the Firestick or the third party app. Not really an issue as pretty much the only stuff I'd be streaming would be from YT anyway. And I just don't care enough about it right now to look in to it.
Could have done it in Mojave too, but I don't usually do this so I didn't think about it much until today.
EDIT: Oh! With this third party app on the Firestick I can use the Firestick remote for playback control!
![2024-06-30 09.19.20.jpg 2024-06-30 09.19.20.jpg](https://cdn.statically.io/img/forums.macrumors.com/data/attachments/1312/1312701-7b807d544e026b6292b0db9215e16dd8.jpg)
Could have done it in Mojave too, but I don't usually do this so I didn't think about it much until today.
EDIT: Oh! With this third party app on the Firestick I can use the Firestick remote for playback control!