Security Update 2020-004: Apple Remote Desktop and Screen Sharing Not Working? Anyone else noticed? I just installed the security update on a remote computer and can no longer access that computer via Apple Remote Desktop or Screen Sharing?
Luckily I had Teamviewer as a backup...
Anyone else notice/got any ideas how to fix this?
I tried cycling everything on and off a few times, restarts, etc. SSH is working OK.
It seems to be exclusively the security update 2020-004 that broke it...I haven't changed anything else, and it's worked all year. Another computer on the network also on 10.14.6 is working fine (since I haven't installed that update on it yet...nor will I until I can resolve this).
Thanks.
No, we are not seeing that. Having ssh is key, you can log in and kickstart the ARD and self rescue most of the time. Even turn off remote access and turn it back on via ssh.

https://support.apple.com/en-us/HT201710

Once you get ARD or physical hands on the Mac , I would reinstall Mojave from the App Store to be sure the OS is installed if you can’t suss out what happened.