Originally Posted by shuffling
For a poker laptop I'd prioritize high resolution, a non-trivial CPU, and an SSD, in that order.
That eliminates 90% of the field, because most laptops don't offer high resolution, use crappy integrated graphics, and a moving-parts HDD.
Most premium laptops today offer 1080p as their max resolution. You'll probably be able to 12-table that in a 4x3 grid with no overlap but the tables won't be full size and you might have some difficulty getting your HUD to look right if you play 6m and especially if you play 9m.
For resolution, at least 1920x1080 (1080p). Some laptops offer higher but that's hard to find outside of Macbook's Retina display, it's a very new thing for laptops.
Any laptop that offers 1080p will also offer a non-trivial GPU, so that takes care of itself.
And for the SSD, aim for a capacity you're comfortable with. If you don't really store any music or videos or pictures or keep lots of installs on your computer, that might be 120GB, but for most people it'll be 240GB.
The other specs don't matter that much if all you're doing is poker. Poker and poker databasing isn't a very processor- or RAM-heavy activity, and if you're getting 1080p your laptop is in a premium category, so the other specs should automatically be sufficient.
edit: I should elaborate. If you're buying a new pc then the only components that you really have to worry about if you are using it for poker are screen (resolution), hard drive (ssd) and RAM (8gb or more).
If you get a 3rd generation Intel processor, HD 4000 is more than enough for playing poker as it can handle 1080p video and a 30" external monitor.
I think if you get a Mac for poker you should definetly get the 15" with the Retina display. Or even an old 17" (but the 15" is sexier). You can use PT2 for Mac and PT4 and HM2 plan on being Mac compatible in the forseeable future...
Sounds like your real question is more about using Mac OS then just the hardware though. I would advise against buying a Mac to use Mac OS for poker (but installing Windows on a Retina Mac is nice for poker).
I've been thinking about getting a new laptop myself, because mine is closing in on 5 years age and I'm starting to feel the old hardware at times. What I like about the Retina Mac is that it's super light and the screen is obviously the nuts. It's a beautiful piece of hardware all around. If I didn't care about weight, I'd definetly get an Asus G75VW though.