This article links out to Apple's documentation for connecting to Airplay on a Mac, iPhone, iPad, and iPod Touch.
PLNU Apple TVs are labeled by the room title or room number and you must be connected to PLNU-WIFI before you can connect to the Apple TV. Click the following link for help with connecting to PLNU-WIFI: https://help.pointloma.edu/TDClient/1808/Portal/KB/ArticleDet?ID=34316.
https://support.apple.com/guide/mac-help/stream-content-to-apple-tv-mh40624/12.0/mac
https://support.apple.com/en-us/HT204289