You program/configure your keymap into the keyboard’s firmware so it is independent of your operating system. If you use Mac, you put your Mac specific keys into the map where you want them. It’s totally up to you - if you want every key to be “a” you can do that :)
Depends. Is this for an Apple device?
Hahaha sometimes hackintosh but mostly Linux and windows at work.
Why does that matter?
If less keys is better may depend on if it’s mac or not (apparently).
Could be lack of customisation available on Mac? (guess only)
You program/configure your keymap into the keyboard’s firmware so it is independent of your operating system. If you use Mac, you put your Mac specific keys into the map where you want them. It’s totally up to you - if you want every key to be “a” you can do that :)