10 Upgrade Problems Of Mac OS X Mountain Lion

Missing Browser Plug-In

It's possible that certain drivers and browser plug-ins might have to be reinstalled or refreshed. This will vary tremendously from one machine to the next and often doesn't crop up until a particular missing or outdated plug-in is needed. The good way to address this is to check all browsers after Mountain Lion is installed and make sure they're set to automatically receive updates.

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