apple are aware of the issues, but from what I've experinced over the past few day's they actuallu don't care, they have no fix for this problem other than buy a newer machine, as a claen reboot doesn't work either as mine won't accept the restore discs that came with my Imac any more due to bios update etc, Apple from what I can tell are washing there hands of the matter, hoping it will go away etc or customers will just bite the bullit and buy new systems.
I've got an appiontemnt with apple store on SUNDAY which apperently is the earliest I could get, when I first called them on Tuesday, a CS callw a arragend as a high priority, but I've never heard from them at all, arranged another one own cost?.what a **** take or what.
I think my Imac isnow fit for spares and parts basically, as to get it to work it will need new logic board, HD etc and other parts to sort it