Apologies if this is a really simple/basic question but since until a month ago I never owned a modern controller (I had a used Wii but other than the last console I owned was the original Nintendo) - got an XBox 360 as a birthday present - so my household now actually has two wireless controllers.
I've read and heard many references to people using controllers with PC games - but I don't know how to connect an XBox 360 controller to a computer - especially a wireless controller and to my Mac (which currently isn't set up to play PC games). I also don't know if this is a good thing to try to do or not (and will I have to constantly re-pair the controller to my XBox 360 as well?) but as I'm trying to finally catch up on nearly two decades of games (starting with things from the past 5-6 years) I have a lot of different games to explore and try.
[I still haven't been able to complete the first Portal - I think I'm stuck at one of the very earliest stages - can't get the timing right, though perhaps a controller might be easier for me than keyboard and trackpad on my laptop?]