So I've had this problem for a while now, where my dock won't let me move the applications in it. I can't drag the applications out, and I can't drag applications in, but I can go into Finder > Applications > *Open Application* and it'll get into my dock. But I can't delete applications from my dock. I tried deleting the applications, *Right Click App* > Options > Assign to: None, deleting the dock file, using terminal's : defaults write com.apple.dock contents-immutable -bool false killall Dock But nothing works. When i write the terminal script, this appears: VINCA-imac:~ KKV$ defaults write com.apple.dock contents-immutable -bool false -bash: /usr/bin/defaults: Permission denied VINCA-imac:~ KKV$ killall Dock I also can't.. move the applications into other parts of my dock, they are STUCK. My dock is like everyone else's except all the applications are stuck. Any help? I also have Parental Controls on my computer (I share it with my family) just incase you need to know.