[fuzzywalrus]

The fascinating part is they're dropping support for a few boxes with no real logical cut off, prior were non-64 bit EFI machines, largely 2006 Mac models. Despite this, you can still install and run OS X rather smoothly on 2006 Mac Pros.

I have a 2008 Mac Pro, and probably will end just bypassing Apple's safe guards. You'd think it'd be not worth the effort but the only things I've noticed my 2008 Mac Pro misses that my 2015 Mac Pro are mostly the lack of VP-x which means you can't run the Windows Phone simulator (not a big deal) and there's a minor performance gap CPU wise and disk performance wise. That said, a lot of the long-in-tooth reason why this machine is still going strong is modular design: 24 GB of a RAM + GeForce GTX 780 means that its still a better gaming machine than any Mac laptop to date.

I don't see any reason to drop 2008 Mac Pros, and I've already seen users running the beta, so I imagine I'll be upgrading against Apple's wishes.