No keyboard on startup?

Discussion in 'Mac mini' started by rmc, Mar 2, 2012.

  1. rmc macrumors newbie

    Mar 2, 2012
    I recently purchased a Mac Mini Core duo 1.83ghz to use as mediaplayer in my living room.
    I noticed that i wasn't able to use any keys during startup, trying to reset the PRAM. Later on, when i replaced the standard 80gb harddrive with a bigger one and trying to use the "C" during startup, i found out t that i can't use any key during startup. I learned that a firmware-password blocks all keys during startup, except alt-option-f-o to enter the open firmware, but i can't even enter the open firmware during startup. The mini simply doesn't respond to any key i try to use on startup. Once booted, the keyboard and mouse work both fine in Snow leopard.
    What can be wrong with my mini?
  2. burne macrumors 6502


    Jul 4, 2007
    Haarlem, the Netherlands
    Nothing. A firmware-password is to protect the machine from unauthorized changes to its configuration, and that it does, as you've found out.

    Assuming you have an administrator-account, you can modify or remove the password after booting the machine.

    Open a terminal, and type:

    sudo nvram -p
    That prints a list of variables stored in nvram, and should include a line with

    security-password %70%61%73%73%77%6f%72%64
    With an ASCII-table you can decode my (and your) password, by the way.

    Removing the password:

    sudo nvram -d security-mode
    sudo nvram -d security-password
    When rebooting you should be able to influence the boot-process or access openfirmware.
  3. Macman45 macrumors G5


    Jul 29, 2011
    Somewhere Back In The Long Ago
    If you are using a BT keyboard which is not connected by cable or dongle to the mac, you can press as many keys as you like...It won't work. Only the cabled variety will work on boot up.

Share This Page