This is the error message after restarting when doing OS X update:
"Command Line Tools (OS X 10.10)" could not be verified. It may have been corrupted or tampered with during downloading. Click Uptade to download and check the update again.
When rebooted back, there's a OS X installation progress screen showing for 10 minutes, and when back on desktop an App Store notification saying that my update didn't get installed. I tried updating and restarting again a few times but still see the same error.