USB Mouse and Keyboard troubleshooting - Macintosh

Details

Mouse or keyboard no longer working.

• Restart computer.
• Does mouse/keyboard work plugged into a known working USB port on same computer.
• Does mouse/keyboard work connected to a known working USB port on another computer.
• Does a replacement mouse/keyboard work connected to a known working USB port on same computer
• Does a replacement mouse/keyboard work connected to a known working USB port on another computer.
• Has software been installed for a 3rd party mouse or keyboard?
  • Does that software need update or rollback?
  • Check compatibility with OS X version.
  • Remove vendor software, and test, often the native OS X can accommodate for a 3rd party mouse/keyboard without vendor software.