I can't figure out how to authorize my Mac
I cannot figure out how to authorize my computer so as to play previously purchased music in itunes
iMac 21.5″, macOS 10.15
Question marked as
See instructions in Authorize or deauthorize your computer for iTunes Store purchases - Apple Support
Note that on a Mac running macOS Catalina you can do it from the Music app, the Apple TV app or the Apple Books app.