Other than that, installation went smoothly. To be perfectly honest, I never got that to work and am not entirely sure that it's a sound plan. You will basically have to download all the firmware files, boot the installation media in such a way that it is prevented from doing network configuration, install the firmware manually, and then try to get it to pick up the firmware. I'm going to say this right away: If you have a MacBook Air and/or no Ethernet cord, you are largely screwed if you use a distro that uses a network-based installation (such as Arch Linux, or the recommended Debian image, or one of the Ubuntu alternate CDs). I have successfully installed Debian Jessie (currently aka Debian Testing) on my MacBook Pro, early 2011. When I originally wrote this answer, I'd only done this once, but now I'm doing it again on a different Mac, so I've split the post into two. If you don't have the ability to use Ethernet, and are installing from netinst media, you're basically screwed (although if you're really determined you can make it work). Tl dr: it's doable but you will have to work just a little bit.

Can you get linux on mac