Can't type Firmware Password (Keyboard not responding)

[X--X]

Hey!

Today I installed El Capitan on my Mac Pro 2009 and it went fine.

Just one Problem: I want to disable SIP System Integrity Protection to change some default icons.

When I try to boot into Recovery Mode the Mac asks me for the Firmware Password, but mouse and keyboard are both not responding, I can not type anything.

I know my Firmware Password but I can't type it in, I'm pulling my hair out here.

Any help would be very much appreciated.

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I tried unplugging everything but the keyboard. I reset SMC. Didn't help.

 

[cerberusss]

Dont you have a USB keyboard lying around?

 

[X--X]

It is the Apple USB Keyboard.

 

[Weaselboy]

https://support.apple.com/en-us/HT204063

Try an NVRAM reset.

 

[X--X]

NVRAM is protected by the firmware password and I can't type that in. We've come full circle.

 

[Thessman]

remove one ram stick and try again

 

[Erdbeertorte]

Are you sure? I never was asked for my firmware password when I did an NVRAM reset.

You could also just boot OS X normally, mount the Recovery HD and open the folder com.apple.recovery.boot, then mount BaseSystem.dmg, open the folder Applications, then go to the folder Utilities and just launch the Firmware Utility.

Maybe you can disable it there. I just tried it to set a firmware password. But it says that non is set when I open it again. I reboot now to see if it worked.


Edit: Worked, I can now do the same again to change or disable it.

 

[X--X]

Thanks I'll try that.