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Mac wont boot after update

Update:11-30Source: network consolidation
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I ran the latest combo update for OX X Lion.  After it restart the mac no longer boots.  What gives?  What kind of update hoses my machine?  Is there a fix?  How do I roll back the update?
This is very fustrating.  Please produce better software.
Thanks,
Carlos

The Best Answer

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go ahead and ddo a force quit - hold the power button for about 10 seconds. Then release it and press as normal to restart. you didnt mention seeing any installing screens so the file was downloaded but the installation didn't start so probably when you restart the installation will commence. If it doesn't, open the App Store program again and switch to the updates tab. You'll either see the restart button (which hopefully will work this time) or have to download it again.
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