Update 2020-11-07: That link now gives a 404 error, and it’s no longer in the Mac App Store. I’ve updated the link to point to the Internet Archive’s copy. And I’ve moved back to the standard Terminal app for now.
When I need to do command-line stuff on my Mac, I fire up Cathode. It’s not iTerm, and it looks like it’s abandonware now, but I get a kick out of the sound and visual effects of working on an old-school video terminal.