I halfway solution I'm reasonably happy with is to have a VirtualBox install of Debian on top of OSX, and install most scientific libraries there. I've considered just wiping and installing Debian as the main OS, but when I first looked the Linux driver support for my MBP wasn't great, and since then I just haven't gotten around to it. VirtualBox works fine for anything that isn't too heavy duty, and anything heavy-duty I'm running on a beefier server machine anyway.
This is a good idea. The problem I have is that I sometimes need basically all my RAM for simulations (yes, occasionally even on my laptop) and my current only has 4GB (with OS X eating up about 1.5GB on startup for "kernel tasks") so it's dangerous to run a VM with more than 2GB. New laptop will def have 8GB though, so this solution becomes viable again, thanks :)
