Is there an easy way to remove DRM on a Mac?

I have looked everywhere and it seems like the only way to remove drm from a protected AAC file is to use the iMovie HD method, which I have tried before and simply cannot get to work. There are a ton of one-click freeware/shareware options for clearing DRM for PC--are there any for Mac? Thoughts/suggestions would be much appreciated.

Basic background: my family bought a ton of music on my Father's Apple ID back when everything was still protected, so much so that it wouldn't be cost-effective to pay to have them un-protected (it'd cost >$200) but as we have gotten older as a family and gotten our own computers, we have run out of authorized computers. Un-DRM'ing the music will allow each of us to run the music wherever/whenever without hassle.

Thanks for your help, all.