2.26 or 2.4 GHz / White plastic unibody enclosure

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Why the updates failed to install?

Hi I have a MacBook Unibody Model A1342, when I click it to start downloading it takes almost an hour to install 7 uptades and I finally come out with an announcement that the download could not be completed because the update is not safe.

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This is a very odd problem, When the Software Update window pops up please can you click "show details". What updates are listed here? Also, which version of OSX are you running?

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Sounds like your key chain is corrupt.

Have you run any disk maintenance on your startup disk (Disk Utility and defrag'ing tool)?

You'll need to boot up on either an external HD or your install CD/DVD's to do a full job. But, before you do, make sure you have a good backup as you disk could be starting to fail.

Focus on one of the updates (smallest) afterwards did it update?

If not do you have a good backup? Try restoring, if not try doing a fresh OS install.

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