Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I just noticed a weird behavior on my dock. The icons seem like if they'd be locked but in fact they are not. For instance when I try to move the icons around, I can take them and move them up. While I'm holding the touchpad, the icon moves with my cursor (that's not the case if the dock would be truly locked), but there won't open any spaces on where I'd like to move the icons to.

I also tried the commands

defaults contents-immutable -bool FALSE
killall Dock

But in fact this doesn't change anything. Is there some additional flag which prevents adding new icons to the dock? I also tried some commands from this list here with no success:

Actually executing defaults read contents-immutableresults in "0". I'm also able to remove icons to the dock, but not add new ones.

Thx for any hint

share|improve this question
up vote 1 down vote accepted

Have you tried deleting the Dock prefs?

share|improve this answer
of course that deleted my links, but apparently it worked...weird. anyway thx :) – Juri Oct 14 '10 at 20:37
When he said Delete he meant: “Backup and then delete” ;) – Martín Marconcini Oct 15 '10 at 15:31
of course I did the backup of the file first, but restoring resulted in the same issue. There must have been something wrong with the file apparently. Now it works however :) – Juri Oct 18 '10 at 5:58

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.