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get "digital signature on the update is missing or invalid" trying to install 10.6.8 combo on MacBook currently using 10.6.3

get "digital signature on the update is missing or invalid" trying to install 10.6.8 combo on MacBook currently using 10.6.3. Have used Disk Utility, Restart, Shut Down, with no luck. Also searched support.apple, no luck. Thoughts?

MacBook, Mac OS X (10.6.8)

Posted on Feb 13, 2013 5:49 PM

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get "digital signature on the update is missing or invalid" trying to install 10.6.8 combo on MacBook currently using 10.6.3

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