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.