I am trying to update from macOS 12 Sierra to macOS 13 High Sierra, but on the Apple App Store I am getting this message: This copy of the install macOS High Sierra.app application is damaged, and can't be used to install macOS. What can I do?
I am trying to update from macOS 12 Sierra to macOS 13 High Sierra, but on the Apple App Store I am getting this message: This copy of the install macOS High Sierra.app application is damaged, and can't be used to install macOS.
What can I do?
Any suggestions or advice welcome!
Thanks!
MacBook Pro 15″, macOS 10.12