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I've had this issue come up about four times now on my 15" retina Macbook Pro, running Mac OS X 10.8.4.

The trackpad will no longer click — neither right nor left click works. Regardless of whether I tap the pad or press the physical click mechanism.

The computer remains responsive via the keyboard and the mouse cursor still moves. However the following symptoms occur:

  • Cmd+Space for the Spotlight menu does not work
  • Cmd+Tab switches between applications but the visual switcher does not display
  • I am able to open apps via the terminal, and force quit them via Cmd+Opt+Esc
  • Plugging in an external mouse via USB exhibits the same behaviour (movement only, no response to clicks)

The only thing I've found that resolves this problem is a restart, which I am able to do via the keyboard. I have attempted to kill all open applications but this does not solve the issue.

Does anyone know how to resolve this issue? I ask because next time this happens I would like to avoid restarting my computer.

share|improve this question
    
Since you can get to your Terminal, try running: killall Dock –  da4 Feb 11 at 17:04
    
did you install any third party mouse software (i.e. microsoft intellimouse)? –  y3sh Feb 11 at 21:21
    
I'm having the same issues. did you resolve it? –  LKK Dec 4 at 1:34

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