Can I use a ps3 controller on my Macbook Air for games such as CoD:Mw1 and CoD:BO1?

Question

So yeah, basically just the question above : Can I?
Also I'd like to know how to connect the controller to the mac. I've looked on the internet for some time and everybody seems to say, just plug it in with the USB-cable and then you're good to go. However for a friend of mine who also has a macbook air, borrowed a controller from someone and tested that, and it didn't work. He's a kinda ********* and won't answer me so I'll ask here. Can I?

Answer 1

If you are using "Restore from Time Machine Backup" option from OS X Recovery, you can only choose from the broad categories presented.
... Can I also use my time machine backup as external storage as well for the files I don't need everyday?
To be clear, if you are asking if you can use the volume containing your Time Machine backup to store additional, non-Time Machine files, the short answer is yes.
It's not a good idea though, since the Time Machine backup will eventually fill all available space, after which it begins to remove old, "expired" backups to make room for newer ones. The presence of additional files doesn't change that fact, and Time Machine will not erase them, but you will encounter a dilemma should you want to store additional files on that volume when there is no remaining space. You will have to make room for them on your own, by deleting existing files. Furthermore, since Time Machine cannot back up its own volume, those additional files will not be backed up by Time Machine.
The easy solution for what you describe is to purchase additional external storage. External USB hard disk drives have become very inexpensive; about $55 will buy a perfectly suitable 1 TB drive.
You can also choose to replace your MacBook Air's internal storage with a larger capacity one. Look for a suitable replacement from OWC / MacSales:
http://eshop.macsales.com/shop/SSD/OWC/Air-Retina
That gets a little more expensive but it is the optimum solution.