Same problem
I am having the same problems, I thought I was the only one having the particular update problem. It shows all the steps completely, then when it asks you to click shut down on the firmware update screen, it does shut down the imac. Problem is when i hold down the power button all it does it make the chime that the imac makes whenever you power up and then shuts off on its own. Am I holding down the power button too long? If I release it right after the chime, it shows a small bar that quickly fills up and disappears which i thought was a quick firmware update, and when the machine automatically reboots, it just shows the update screen once again, saying you have to repeats steps 2,3 and 4.
I have repeated this several times with no luck. I can't get my bootcamp to load windows it just freezes at the screen that says now starting windows and gets stuck. Although if i instal my windows thru vmware's fusion it works without a hitch.
I just need some answers to help me out like:
1. how long do i keep the power button pressed?
2. is it normal that after holding down the power it starts up then shuts down? (do i keep the power depressed for several more mins?)
I hope someone can assist me.
Best regards,
Kerwin🙁