I'm trying to update my mid-2011 iMac.

Question

Level 1

8 points

I'm trying to update my mid-2011 iMac.

I'm getting this message from the Apple Store. "This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS." Any alternatives?

iMac 21.5″, OS X 10.10

Posted on Aug 18, 2021 1:58 PM

Reply

Answer 1

Aug 24, 2021 7:17 PM in response to moregan100

Change the DATE in TERMINAL from a boot USB or from CMD-OPT-R recovery mode. Look up High Sierra's Date of manufacture/release and us that. Format date as: MMDDYYYYMmSs

Reply

Answer 2

Niel

Community+ 2025

Level 10

741,167 points

Aug 18, 2021 2:01 PM in response to moregan100

Choose Applications from the Finder's Go menu, throw the existing installer away, and download another copy.

(203392)

Reply

I'm trying to update my mid-2011 iMac.

Similar questions