Yeah it was called Front Row, which brought up an Apple TV like interface in OSX. Pretty dumb they removed it IMO it was pretty good with iMacs.

It was great with the Mac mini. The actual Apple TV had its limitations, but with a Mac mini I had Front Row, plus a host of other media apps. I also had an app that would let me control everything with the IR remote they came with it. That was back when they still came with an optical drive as well, so I could also play (and rip) DVDs.

iMac G5s too! They even had a spot on their right side which was magnetic where the remote from that era could be stuck when not in use. My 20” iMac G5 doubled nicely as a TV in my high school years (and the 27” model with its dramatically nicer IPS panel even better in my college years).

My first Intel iMac had that spot too.

Ah good old days when I was in college and used to use my 2006 White Polycarbonate MacBook with the said remote as a glorified DVD player to play movies I'd rent from Blockbuster. Can't believe that was 20 years ago