I chose a partition to boot from called DW for Intel systems.
IMac now wont boot so I can change startup drive.
When I choose DW disk to boot from by holding down letter "c" at startup, it gets stuck on spinning gear.
I've searched around Gogle and Apple support forums without luck.
I dont have ApplrCare.
I am flustrated. :-)
I think I can call Apple and pay per incident call or something -- I think. If I try to get help here, I get so d a m n e d mixed up. Getting too old -- too old.