I've this build:
AMD Athlon X4 631
AMD Sapphire HD 6670
4GB DDR3 - 400GB Western Digital
Yosemite works, but when I reboot or start from power off, Yosemite stucks before "VGA point" (I see it near bluetooth transport message).
I can boot only with -f: why? I mean everything is fine, it works great. I'm just curious!
p.s. another thing: how can I see that the processor works with all 4 cores?