I have found the solution for “This copy of the Install OS X El Capitan application can’t be verified. Using command “date 0923020415 “ and it worked. It most likely worked for them because they recently installed/reinstalled 'El Capitan OS X installer.app' into their Application folder ntpdate -u ) works for some people, but not for me. I heard setting the date automatically in the terminal (i.e. If you can neither remember nor correctly guess the date you installed 'El Capitan OS X installer.app' into your Application folder, then you would have to delete it and reinstall it into your Applications folder so that the digital signature/certficates for the installer is no longer expired.Īlso, setting the date manually in the terminal (i.e. date 0923020415), the installation worked without a problem. date 03061225616) and it did not work because I installed 'El Capitan OS X installer.app' around Sept 2015 and the digital signature/certificates for my installer had expired by now. When I got this error while reinstalling El Capitan OS X, I set the date to today's date (i.e.

You have to remember the date you installed 'El Capitan OS X installer.app' into your Application folder.

I think many people think setting the date to the current date automatically fixes the issue, but this is not the case. By the way this is not a date time issue, date is correct on my computer.

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