Displaylink ceases to work in 10.13.4

[XoneMark]

Originally Posted by smp999

Well - the temp solution that was working has now failed me. It's back to clone mode and I cannot get to work properly. I have uninstalled and re-installed beta4. Nothing. I have set the security settings and unplugged the ubs device. No luck. I will try tomorrow.

I have a Mac Mini setup with a Thunderbolt Display and 2x 20 inch Cinema Displays and one of the Cinema Displays is setup to use the DisplayLink adapter. After you shutdown or reboot the Display Link monitor will only run as a clone UNLESS you disable your Firewall in the security settings.

You will need to disable the firewall, then unplug the adapter, then plug the adapter back in before you can use the extended display option again.

Once you extend the screen to the extra display you can reactivate the Firewall if you want to. You'll still have to do this every day until they get the software updated. Hope this helps somebody.