Sorry, yeah, that's a good point. Now I'm at home I can check: High Sierra. I usually only update when I either need to because a program I want to run doesn't

Sorry, yeah, that's a good point. Now I'm at home I can check: High Sierra. I usually only update when I either need to because a program I want to run doesn't support the old OS, or the OS stops receiving security updates, or if I get really bored one night.