I am an iPhone dev primarily so I have to use OSX, which I am fine with. I also do webdev in Django and that's fine too, but sometimes OS X likes to play with

I am an iPhone dev primarily so I have to use OSX, which I am fine with. I also do webdev in Django and that's fine too, but sometimes OS X likes to play with my python and mysql versions (especially on OS upgrades) -- since I don't have to do this every day (or even every month), I often spend the first few hours of a new task with it trying to figure out how to fix them. I haven't switched to using vagrant for all server dev, but if I had to do it a lot, I would put my dev environment inside vagrant and isolate it from OS X. I deploy to Linux anyway, so there's no point in making it work on OS X.