Security Update 2020-002 freeze during the restart process
Hello,
I am installing the Security Update 2020-002 on my iMac 18,3 running High Sierra but the upgrade process freeze during the restart process.
During the reboot, I just get a black screen with the pointer displayed and it doesn't go further.
Is anyone facing the same issue ? What is the workaround ?
I still can force the iMac to turn off using the button and when I turn the computer on, it starts as usual. But I can see in App Stores > Updates, that there is a restart expected to finalise.
Thank you for your help or comments.
iMac 27", macOS 10.13