This copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading.

After following the instructions on creating install media for Mac OS X Mavericks, I repeatedly got the error message “This copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading.” After some web searching, I came across Jonathan Mohar‘s blog with the bit that did the trick! You simply have to set the date on your computer before you attempt the installation.

  1. From Utilities menu, pick Terminal
  2. Set the date using the command: date 110216472013.53
  3. (Optional) You can get an actual current date from another machine in the Terminal with the command: date “+%m%d%H%M%Y.%S”
  4. Then type exit to exit the terminal, or command-Q. The installer comes back up, and all is well.

Thanks, Jonathan! =)

About

Aaron Kondziela is a technology and design freelancer and serial entrepreneur living in Buffalo, New York.

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24 comments on “This copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading.
  1. Josh says:

    Thank you so much for this!!! I’ve been trying to solve this issue for a few days now. I had read about changing the date, but since I am doing a clean install I couldn’t just go to the settings to change it. Using this terminal command worked perfectly.

    Big thanks

  2. bobby says:

    hi
    my startup disk is already erased.how do set the time? i cant pick terminal :(

  3. Federico says:

    That was great! I’ve been looking on how to solve this problem for an hour but I had no idea how to set the time manually. Thank you so much for sharing!

  4. Aaron K. says:

    You’d have to boot from a MacOS CD/DVD, and get into a terminal from there. Should be in the menu after you boot from the disk. Just hold down the C key while you reboot with the disk inserted.

  5. Aaron K. says:

    No problem, I’m glad it was helpful! =)

  6. C.W. says:

    After downloading Mavericks 4 times over Verizon wireless and continuously getting “This copy of the Install OS X Mavericks application can’t be verified….” then trying it once on DSL and getting a perfect download/install, I think it’s clear that apple store’s data validation over wireless sucks.

    I’ve not had any trouble with any other application from other sources using the same wireless.

    If you are using a wireless connection to get Mavericks and it keeps breaking, I would suggest trying a nailed up internet connection instead.

  7. Aaron K. says:

    Ya know, I had this problem also. It’s such a large download, there’s a higher chance it’ll be corrupted. If only we could download a file and run an MD5 checksum on it to verify, like the rest of the world can do!

  8. Kamil says:

    OMG. Great job. Thank you very much.
    I change date to actual and everything goes fine.

  9. Thomas says:

    Damn – i have been working hard to find a solution for this problem !
    Thanks – Aron ;-)

  10. Aaron K. says:

    Happy to be of help!

  11. Andre says:

    Man, you saved me a lot of time.
    I was trying to install mavericks from scratch on my macbook pro, because I replaced the hard drive with an ssd, but the installer kept giving me the ‘can’t be verified’ error.
    Thanks a lot.
    Greetings from Brazil.
    Sorry for my bad english

  12. rr says:

    Thank you very very very very much!!

  13. Aaron K. says:

    Seu Inglês é bom!

  14. Sheryl says:

    I tried the date change in terminal and I get: “operation not permitted” :( Really frustrating. Any oterh suggestions?

    I have a Macbook Pro with OS X Lion 10.7.5, Late 2011, so it meets the requirements for this install.

  15. Sheryl says:

    “other” sorry not “oterh”

  16. Sheryl says:

    I wish I could say the above suggestions worked for me, but they didn’t. :(
    Also, the date and time in my terminal already were correct. I tried to change it anyway based on the above comments but got an error message.

    Any other ideas?

  17. Lilolbear says:

    Thank you

  18. Aaron K. says:

    I haven’t had to battle this error message many times, so I don’t have a ready suggestion for you. However I did see others suggest that the Mavericks download process sometimes would produce a corrupted file, so you may want to try getting a fresh copy. Otherwise, keep at it and cross your fingers! Good luck!

  19. Jodi says:

    Thank you! Thank you! Thank you!! You just saved me from losing anymore of my sanity!! Doing a clean install of OS X Mavericks from a flash drive. Did it first with my MacBook….flawless. Then used the same flash drive on my Mac Mini & got this message. After several days of trying different things & getting impatient with time machine restore here I am!! Thank you sooooo much!! My download only has 2 minutes left!! Woohoo :)

  20. Jodi says:

    FYI…..For me, I tried to put the current date & time in & I still got this message…..eventually I just put the numbers in exactly as they are posted in the example & viola!! No more message!! Install is done & my Mac Mini is restarting :)

  21. Konstantin says:

    Thank you so much! Fixed my problem immideately!

  22. Nan says:

    dude! genius!!

  23. Bezart says:

    Thanks man! You has saved my evening!

  24. Aaron K. says:

    Awesome, glad it helped you!

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