new install - graphics issue

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http://crunchbang.org – Hey all, new to #!. To make a long-ish story short, I installed successfully but when I boot into the system, I get this. This is on a retina macbook pro. Didn't get any errors during install, grub loads up fine. Tried appending kernel params at boot to use noapic, also tried intremap=off - neither worked. Something else worth noting is that when I try to boot into #! with rEFIt, it either hangs or says missing OS; when I boot into it with Apple's bootloader, I get result in the image. I imagine I've left something out, so let me know if there's more info I could provide. A (HowTos)