Yeah, I'm a little concerned about updates breaking things. The good thing about this hack is that you don't have to modify your installed OS X system. If I u

Yeah, I'm a little concerned about updates breaking things. The good thing about this hack is that you don't have to modify your installed OS X system. If I understand correctly, the Chameleon bootloader emulates EFI64 and fakes OS X into thinking you booted an EFI64 system. So I think the likelihood of updates breaking things is much smaller than that of Hackintoshes, for example. Nevertheless, I'm going to try to make sure I have a full backup before doing any major OS X updates. I also have both a Lion backup (as well as an old Snow Leopard backup) that I can boot up in case I need to.