There is a small mac store on Al Rayyan Road. It's almost opposite the Rydges Plaza, there's a fair sized car park outside it. Sorry, useless at giving directions but it is fairly easy to spot.

I went in for a repair so didn't have a good look at their range to see how up to date it was. They looked at my MacBook a bit funny but I'm sure I saw MacBook Pro's in there. I was in there about 2 months ago so maybe they have new stock by now?

Good Luck!