I'm in SL on my mac. I'm not used to this. This is so weird.

How so

I'm just so used to my pc that I feel like a noob. I don't know which buttons to press to do things like cam and zoom.

I found them similar. Except option, that was weird

My mouse wheel moves upside down, too.

Oh that's because TouchPad uses natural movement like on tablets. Just uncheck that for external mice