Currently Being ModeratedOct 25, 2012 11:34 PM (in response to mikehenden)
Is it possible you have Firmware password protection in Mac OS X ...
It would block usage of all the startup keys, like C, N, T, D, CMD+s, CMD+Option+p+r, CMD +v, Option, and Shift, as well as booting from anything but the Hard Drive.
Currently Being ModeratedOct 25, 2012 11:39 PM (in response to BDAqua)
Don't think I ever downloaded this firmware or enabled it. How would I be able to tell? Is there a control panel or anything that I can turn off if this has been enabled?
Currently Being ModeratedOct 26, 2012 12:22 AM (in response to mikehenden)
What happens/shows if you hold alt at bootup?
Currently Being ModeratedOct 26, 2012 1:20 AM (in response to BDAqua)
That's the problem - Firmware Password Protection is enabled. Don't know how or when it happened or what the password is. Do you have any pointers to help me get past it?
Currently Being ModeratedOct 26, 2012 1:57 AM (in response to mikehenden)
1. Shut down machine and unplug power supply
2. Fiddle with the RAM DIMMS. Specifically (carefully) remove a memory card and replace it. Be very careful that the static electricity from your person doesn't 'shock' the card. Wear an anti static strap or keep yourself grounded to the machine.
3. Once card replaced, restart machine holding down Opt+Control+P+R ('zap the PRam'). Hold keys down until you hear the Mac startup time three times. At this point the PRam has been wiped and you can relear keys. Password is wiped from memory.
Currently Being ModeratedOct 26, 2012 10:02 AM (in response to mikehenden)
Great news, good work, thankls for the report back!