I've tried to install the 10.9.3 update three times. Each time, the app store downloads, the machine reboots, and then up comes a dialog complaining that it could not verify the update. Upon clicking OK, it reboots and spends 7 minutes putting things back the way it found them.

Disk utility finds nothing to complain of, and there's plenty of space.

Machine is running 10.9.2, and it is a mid-2011 mac mini.

What do I do?


Try installing the combo updater instead:


  • This answer is accepted. Is my assumption that the problem is resolved justified? I would (and others who come here with the same problem) like to know :) – Mathias711 May 18 '14 at 20:48

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