10.6.4 upgrade issue

in macOS edited January 2014

I am trying to install 10.6.4 on my MacBook Air using my USB SuperDrive. The installer script begins and proceeds until I "Agree" to the license and then promptly disappears from the screen without any error message. I checked the install.log in Console and it is reporting that the installation "Failed installation-check {\

NSLocalizedDescription = ""; \

NSLocalizedFailureReason= " ";\

}. Not much help there.

I've checked both the install disk and my disk and both are in fine working order.

Any ideas about what might be going on would be GREATLY appreciated.

Many thanks.
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