I tried factory resetting MacBook Pro but now when I try installing macOS High Sierra it gives me the error message “this copy of the macOS High Sierra application is damaged and can’t be used to install macOS.” Has anybody had this similar problem? If so is it fixable and how do I fix it? Thank you in advance!!
[Re-Titled by Moderator]
MacBook Pro 13″, macOS 10.14
That error message typically appears when the system date in the Mac is more recent than the expiration date of the certificate embedded in the High Sierra installer. If you can, try resetting the Mac's internal date to a date prior to Nov. 12, 2020, which was the date of the final release of High Sierra (10.13.6). Perhaps via Recovery - Terminal??
If you can get to Terminal, enter the following commands:
date - this will display the current date set in the Mac
sudo date MMDDhhmmYY - this syntax of 2-digit numbers will will set the date & time
sudo date 1112160420 - this example would set the date to Nov 12 2020 at 16:04 hours
That error message typically appears when the system date in the Mac is more recent than the expiration date of the certificate embedded in the High Sierra installer. If you can, try resetting the Mac's internal date to a date prior to Nov. 12, 2020, which was the date of the final release of High Sierra (10.13.6). Perhaps via Recovery - Terminal??
If you can get to Terminal, enter the following commands:
date - this will display the current date set in the Mac
sudo date MMDDhhmmYY - this syntax of 2-digit numbers will will set the date & time
sudo date 1112160420 - this example would set the date to Nov 12 2020 at 16:04 hours
Choose Applications from the Finder's Go menu, throw the existing installer away, restart the computer, and download it again.
(257063)
ps. In the Recovery app, choose Utilities > Terminal. And if it doesn't work with the plain "date" command, you may have to enter it as sudo date 1112160420
Hold these keys at startup:
Option-Shift-Command-R: Start up from macOS Recovery over the internet. Use this key combination to reinstall the version of macOS that came with your Mac or the closest version that’s still available.
I can’t get to anything on the computer because I factory reset it so I only get as far as the install macOS screen & then get an error
“this copy of the macOS High Sierra application is damaged and can’t be used to install macOS.” while installing macOS High Sierra.
