It was 2AM last night and I simply gave up. After 6 different downloads, three USB drives and numerous attempts, I was defeated.
I could not get Mavericks to install on my 2011 MBP. I had already cleaned out the drive in an attempt to start fresh and was SOL.
I’ve been following several threads on Apple Support forums about this same issue and found a single post (thank you Jonathan) that outlined a very simple solution to this problem…your Mac’s time.
Apparently when the software is being downloaded, part of the verification is date and time, so make sure to check your machine’s date and time to see if it’s off.
I simply ran the date command in terminal and saw that my MBP was showing January of 2001…weird.
I then ran the same command with today’s date, see below…
After running the command I closed Terminal and attempted to run the Mavericks install again…here I am typing from that same machine two hours later.
I hope this resolves the issue for most of you experiencing it. If there are other solutions please feel free to share with others in the comments below.
Note: This workaround may resolve the following error, “This copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading.”