I think it technically is but it looks like OSX picks the (‘mac edition’ ?) card. You can run it on i915 or on the nvidia but you have to set it under OSX.
- boot into OSX
- install gfxcardstatus 2.2.1
- select Discrete first ; then select Integrated card (a popup must be displayed in both cases in the top right corner indicating the operation succeeded)
- reboot, start Linux
MacBook Pro 10,1 + i915
…and you running on intel; cooler but with a lamer gfx. If you want more gfx power follow @brahma’s advice.
Update: MacBookPro10,x - ArchWiki has all/further info on the issues with the 10,1 15" model.
To sum it up: “Nouveau and intel work fine.”