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OS X Mavericks: If an app freezes or quits unexpectedly

If an app freezes or quits unexpectedly

There are several solutions to try.

  • If the app is frozen, force quit the app. Press Option-Command (⌘)-Esc, select the app, then click Force Quit.

    When you force an app to quit, you may lose unsaved changes.

  • If the app quit, reopen it by clicking Reopen in the dialog that appears.
  • Restart your Mac.

    Methods for starting up your Mac

  • Read the app’s documentation to check if it’s compatible with your version of OS X.
  • Open another file in the app. There may be a problem with the original file.
  • Check for updates to your software.

    Keep your Mac up to date

  • Disconnect any peripheral devices you just connected (for example, a printer). They may not be compatible with your version of OS X.
  • Uninstall any app plug-ins or enhancements from other manufacturers.

    If you recently updated the app or OS X, a plug-in or enhancement you installed may no longer be compatible.

  • Use Apple Diagnostics or Apple Hardware Test. These tools can tell you if hardware you installed, such as additional memory, is incompatible, improperly installed, or defective.

    Use Apple Diagnostics or Apple Hardware Test

  • Restart your Mac in safe mode.

    Start up in safe mode

  • Use Disk Utility to repair your computer’s internal disk.
Last Modified: Oct 23, 2013
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  • Last Modified: Oct 23, 2013
  • Article: PH13975
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