Operating system upgrade problems.
I am trying to upgrade my 2017 (21") IMac from Monterey OS to Ventura OS. I get a window that says 'checking null' and that is as far as it will go. What to do??
iMac 21.5″, macOS 10.13
Question marked as
Try to update while started up in Safe Mode.
see > If an error occurred while updating or installing macOS - Apple Support
For a short list of things that can interfere with an upgrade.
1) The lack of adequate Free Disk Space
2) Third party Anti Virus software
3) Optimizing software
4) Cleaning software
5) VPN's