Q: This copy of the Install OS X ...can't be verified.
I've been having the:
“This copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading” same problem with Mountain Lion in the last month. A friend pointed out to me this site:
• PSA: Updated Apple Certificates means old OS X Installers do not work anymore - Ars Technica:
So the certificate for those installers ran out on Feb. 16th. I saw on another site the fix was to set the date time to a time before the expiration date.
If I'm booted into the USB installer I turn off Wi-Fi and disconnect the Ethernet cable. I open up utilities - terminal and type in:
"date 0202020216"
Hit enter. Now the computer thinks it's Feb 2nd at 2:02 AM, 2016. Fourteen days before the certificate expires.
This worked with a .dmg file and my old bootable USB stick.
If you're already booted and using a .dmg file to install just change the date/time in System Preferences after disabling the network connection.
MacBook Pro (15-inch 2.4/2.2 GHz), OS X Mavericks (10.9.4)
Posted on Mar 23, 2016 4:18 PM