@alienghic I was just kidding. I think the HIG is holy, and should be broken only in extreme cases where the app is doing something so out of the ordinary that it wouldn’t make sense otherwise—that doesn’t happen often at all, by definition. Adherence to the HIG is a sign of respect to the user; breaking the HIG is a sign of disrespect.

Early Macs used rounded rects for radio buttons, which later turned into circles. Funny thing is, I don’t think I ever saw a checkbox on old Macs—a checkbox was basically an ON radio button next to an OFF radio button.

I think checkboxes come later, but my memory is fuzzy. Here are some screenshots of System 3 and System 7: