Q: Clean Install via USB Flash Drive "Can't Be Verified"
I recently purchased a solid state hard drive for my 2009 15" MacBook Pro with the intentions of doing a clean install of Yosemite upon its release. I used the "createinstallmedia" terminal command to create a bootable USB installer (and have done this twice so far). Every time I attempt to run the installer, the progress bar will complete up to "about a second left" then wait ten minutes before I get an error stating, "This copy of OS X Yosemite application can't be verified, it may have been corrupted or tampered with during downloading." The error log (Cmd-L) has given the same errors at the very beginning of the installation process every time.
After doing some research, I found that this was an issue for OS X Mavericks as well and could be fixed by verifying or setting the time.
But I am posting here since the above method did not work. Is it possible my USB flash drive is giving me the flack?
If anyone else has had this issue I would love to hear from you! Thanks!
MacBook Pro
Posted on Oct 17, 2014 12:30 PM
This is a cold thread, but I recently had the same problem with OS X Mavericks (10.9) and Yosemite (10.10) flash drive installs on two different Macs. Per their included documentation (and the "Check Date & Time..." link above), I then reset the date/time to the current date/time and retried several times; still no go.
Then I ran across a related suggestion: to reset the date/time to an OLDER date/time. I used March 18 2013 at 12:50 ("date 0318125013") and VOILA, no error, install ran successfully.
Hope this helps.
Posted on Mar 11, 2016 5:22 PM