Dunno. With Linux being a loosely coupled collection of parts, it is quite possible to upgrade the kernel without disrupting userspace. And with Apple, you are

Dunno. With Linux being a loosely coupled collection of parts, it is quite possible to upgrade the kernel without disrupting userspace. And with Apple, you are dealing with one vendor support a small set of their own products. The only way to get into this issue would be with a hackintosh rig.