How can I run Apple Hardware Test with a firmware password set?
I have a firmware password set using the Firmware Password Utility.
When I hold D immediately after power-on to start Apple Hardware Test, nothing happens. My computer boots normally.
How can I start Apple Hardware Test?
Solution 1:
Your firmware password must be disabled to start Apple Hardware Test. To do this:
Either boot into OS X Recovery (hold ⌘+R while powering on) and select Firmware Password Utility from the menu, or follow these instructions.
Select "Turn Off Firmware Password...":
Enter your firmware password to disable it:
Select "Quit Firmware Password Utility":
Restart your Mac and attempt to launch Apple Hardware Test again with D.