You might experience the progress bar hanging around 80-90%.

After finish downloading, everything is ready to go.

Re-download the updates of Os X El Capitan.

Make sure you delete existing 'Install Os X El Capitan.app' in Application.

Install & Download your OS X El Capitan in SAFE MODE.

When you see apple logo, release the Shift Key.

Make sure you have an internet connection about 10Mbps at least. If you have tried changing the date / time / on a startup disk, forget about it. It may have been corrupted or tampered with during downloading” error! 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.

For apple instal Heart Box