Or OSX, or macOS. It’s hard to believe that you are 20 years old. I’ve been using you and your predecessors longer than I used classic Macintosh systems starting with System 4.2 all the way through Mac OS 9 from 1987 through 2001. And now that you are starting your 21st year, you have turned 11 — macOS 11 (Big Sur), that is.