New iMac i7 will not boot into Single User Mode

Wireless keyboard?

If so might have to plug one in a wired keyboard from the Mac in the closet.

Bill P. said:

Ah, good idea SB. Didn't have that problem on the old 20 incher....I'll give it a shot!

Enjoy your Saturday!

Click to expand...

Apple had that problem when the keyboards first came out, took awhile before they corrected it.

Just figured that it would be typical for a new chipset and all the rewrites in the OS to cause the issue to pop up again.

Problem is not exclusive to wireless keyboards

I have a wired Macally keyboard that I have been using with my March 2009 iMac 3.06GHz. I am also using the wired Mighty Mouse, connected to the keyboard. Never had any problems until today. I tried 2 times to boot into Single User Mode by holding down CMD-S. The OS just ignored my keyboard presses and booted back to the Finder.

I then pulled the stock Apple keyboard (wired kind, without the numeric keypad). I then rebooted, quickly held down CMD-S, and to my surprised it worked. I got the command line. However, I then could not type anything. So I connected my Macally keyboard back (after having disconnected the Apple keyboard) and then I could type.

Not sure what's going on here, but that is my experience.