Disabling the Shutdown Shortcut on a Debian Installed MacMini (Late 2014)

1. Open the keyboard layout file for editing:

sudo nano /usr/share/X11/xkb/symbols/mac

2. Locate the following section of the file:

partial alphanumeric_keys

xkb_symbols "macintosh" {

...

key { [ dead_grave, dead_acute, dead_circumflex, dead_tilde ] };

key { [ 1, exclam, 1, exclamdown ] };

key { [ 2, at, twosuperior, section ] };

key { [ 3, numbersign, threesuperior, masculine ] };

key { [ 4, dollar, onequarter, onehalf ] };

key { [ 5, percent, threequarters, superior ] };

key { [ 6, asciicircum, dead_diaeresis, dead_abovering ] };

key { [ 7, ampersand, braceleft, deadabovedot ] };

key { [ 8, asterisk, braceright, dead_doubleacute ] };

key { [ 9, parenleft, less, dead_cedilla ] };

key { [ 0, parenright, greater, dead_ogonek ] };

key { [ minus, underscore, dead_belowdot, dead_macron ] };

key { [ equal, plus, dead_abovedot, dead_doublegrave ] };

key { [ q, Q, at, dead_doubleacute ] };

key { [ w, W, numbersign, dead_caron ] };

key { [ e, E, eacute, EuroSign ] };

key { [ r, R, asciitilde, dead_breve ] };

key { [ t, T, apostrophe, dead_abovering ] };

key { [ y, Y, yen, superior ] };

key { [ u, U, udiaeresis, Udiaeresis ] };

key { [ i, I, idiaeresis, dead_doubleacute ] };

key { [ o, O, ograve, dead_circumflex ] };

key <AD10> { [ p, P, dead_abovedot, dead_cedilla ] };

key <AD11> { [ bracketleft, braceleft, dead_belowdot, dead_doublegrave ] };

key <AD12> { [ bracketright, braceright, dead_macron, dead_abovedot ] };

...

};

3. Comment out the following lines by adding a hash (#) at the beginning of each line:

key <AD11> { [ bracketleft, braceleft, dead_belowdot, dead_doublegrave ] };

key <AD12> { [ bracketright, braceright, dead_macron, dead_abovedot ] };

4. Save the file and exit the editor.

setxkbmap mac