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Getting rid of Apple OS X update annoyance which blocks shutdown and restart of computer

Upgrading to Apple OS X Mountain Lion does introduces it's own set of annoyances, and one of them is auto system updates which does not allow system to power down until finished. With a slow internet speed and GB's of update to download this can be a real annoyance, as shown in the screenshot below the update would take more then a day to finish.

MAC Appstore updates

Luckily, there is a way out as demonstrated below.

If you try to shutdown/restart your MAC while updates are downloading you will be shown following errors :

Error - Cannot quit while while updates are in progress. OS updates must complete before the App Store can quit.
Error - The application App Store canceled restart. To try again, quit App Store and choose restart from the Apple Menu.<br />

To continue restart/shutdown you will need to forcibly quite the MAC AppStore app by one of the following method :

1). Goto Apple menu > Force Quit, select "App Store" from the list, and click "Force Quit".

2). Hold down the Command and Option keys and press Esc (Command+Options+Esc), select "App Store" from the list, and click "Force Quit".

To avoid this in future, disable automatic updates from going to System preference -> Software Update dialog box. You can always download updates manually at full-speeds (multi-part using download manager) with full pause and resume capability using the OS X Manual Update download method blogged earlier.

OS X Auto update

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