macOS Sierra: If an app freezes or quits unexpectedly

If an app freezes or quits unexpectedly

There are several suggestions to try.

  • If the app is frozen and unresponsive, force quit the app (you may lose unsaved changes). Choose Apple menu > Force Quit, select the app in the dialog that appears, then click Force Quit.

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

  • Restart your Mac by choosing Apple menu > Restart.

  • Read the app’s documentation to see whether it’s compatible with your version of macOS.

  • Open another file in the app. There may be a problem with the original file.

  • Check for updates to your software.

  • Disconnect any peripheral devices you just connected (for example, a printer). They may not be compatible with your version of macOS.

  • Uninstall any app plug-ins or enhancements from other manufacturers.

    If you recently updated the app or macOS, 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.

  • Restart your Mac in safe mode.

Published Date: Mar 28, 2017
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