I cannot install macos sierra it says The installer information on the recovery server is damaged. I have tried changing the daye so that i can use expired certificates cause that was what was recommended but then another message pops up that says untrusted certificate title . What can i do to fix this problem?
iMac Line (2012 and Later)
Hi there, roxana125.
It appears that you're having a problem installing macOS Sierra on your Mac. You receive a message that the installer information is damaged. When you try to change the date in order to use expired certificates, you receive another error message. We understand how important it is that your Mac works as expected, and we're glad to help with this.
How to reinstall macOS from macOS Recovery - Apple Support -- Restart your Mac in macOS Recovery to install macOS Sierra. This should bypass the certificate issue.
Feel free to get back to us with any questions or problems you may have.
Take care.
ecovery server is damaged.
