I've spent the last 13 years on the Microsoft Natural Keyboard, as pictured below. The exact keyboard you see below. My hands, arms, brain are 100% adapted to that keyboard. I have never found another keyboard that comes close. That being said, here I am typing on this Apple Wireless keyboard, which I love, but it hurts like hell on my hands and forearms. As elite as i want to be using all apple stuff, I am not sure I can go another number of years like this. So, are there any good ergonomic keyboards for the Apple system? I've seen a few, but nothing that really stands out. No one really does the split keyboard anymore OR, is there any way to use a PS2 keyboard on a Mac Pro? like an adapter or something? And would I be able to map the keys from an old PS2 to the control, option, command keys of apple? Any ideas?