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Question

OS X 10.11.3 Installers

  • February 29, 2016
  • 4 replies
  • 35 views
A
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I have created installers for OS X in the past on USB Thumb Drives and Volumes on External Drives. This has worked for Mavericks, Yosemite, and El Capitan version 10.11.2. I have used the "createinstallmedia" app located in /Contents/Resources/ and terminal to create the installers.

All of a sudden in Mac OS X 10.11.3 when I try to use the installer I get a message "This copy of the OS X El Capitan application can not be verified. It may have been corrupted or tampered with during downloading."

After reading some posts on Jamf Nation, I tried downloading the "DiskMaker X" app to create bootable installer. It creates the installer, but trying to install brings up the same error message.

Anyone have any clues?

    4 replies

    J
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    • jhalvorson
    • Honored Contributor
    • February 29, 2016

    Did you happen to copy the installer to a file server? I' had that issue on a couple of occasions. I've gotten in the habit of downloading, compressing to zip, and placing the zipped copy on my server to avoid corruption with the installer app.

    I suggest deleting the installer and downloading again from the Mac App Store.

    T
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    • tthurman
    • Valued Contributor
    • February 29, 2016

    I had this issue recently. Plug it into the network and try again.

    Regards,
    TJ

    apizz
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    • apizz
    • Honored Contributor
    • February 29, 2016

    Might be related to Rich's post here

    AP
    J
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    • jason_bracy
    • Valued Contributor
    • March 1, 2016

    Yes, this is definitely because of the certificate expiration. I had the same issue recreating my 10.9, 10.10 and 10.11 media from archived installers last week. If you re-download the installer it should work fine.

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