On most of these Macs, THERE WILL BE NO graphics acceleration WHICH SHOULD NOT BE IGNORED. Check the red box above to learn simply how bad those Macs will run. If you really want to be dumb and ignore me, well, I can't stop you from that, but at least make a backup. If you don't make a backup and ignore me, then you'll be in a whole lot of pain later on, and that's not my fault. Other than graphics acceleration, you'll be pretty much fine after you patch the kexts.