iPhone 12Pro Max Restore update to IOS 15
I am trying to restore or update my iphone 12 Pro Max but i get a message "could not be restored because the firmware file was corrupt"
I tried to do it just on my phone, on my Mac, I've tried t restore it on my Mac, I erased all info on my phone to start new, did not restore it, just went for the upgrade and still the error. I am not getting an error code on my phone or Mac.
Any Advice?
Thanks,
Jeff
iPhone 12 Pro Max