

Run sudo date -u 120200002021 & sudo reboot (AKA Date Command) in Terminal.Ignore any error messages on running the above.Run crlrefresh rp & sudo rm -f /var/db/crls/* & sudo sqlite3 ~/Library/Keychains/*/ocspcache.sqlite3 'DELETE FROM ocsp ' (AKA Purge Command) in Terminal to purge the current cached Certificate Revocation List.Run sudo sh -c 'echo "0.0.0.0 " > /etc/hosts' & sudo sh -c 'echo "0.0.0.0 " > /etc/hosts' & sudo killall -HUP mDNSResponder in Terminal.If you do not have a usable backup from before, download MacOS as well as you may need to reinstall.Download the web drivers in case you need to reinstall them.Once in Safe Mode, carry out the following steps: Normal: The Mac is not using safe mode.In the System Software Overview, look at the value listed next to the item labeled Boot Mode.Go to About This Mac > System Report > Software.You can verify you are in Safe Mode as follows You might be asked to log in a second time.

To do this, turn on or restart your Mac, then immediately press and hold the Shift key until you see the login window and log in to your Mac.

This will enable a basic GPU driver that will, while not accelerated, allow you to operate your Mac. Not typically something recommended but I suppose it makes little difference when running HiSierra.įirst, you need to boot into Safe Mode. It seems the answer is to simply completely disable all certificate revocation checks. While this procedure still generally works, it has been superseded by an improved and easier scripted process available in POST 461Īug 2022 Update: Use this option only if the information in Post 1 does not work for you
