Great!

You need to follow the article:
https://support.displaylink.com/know...lay-is-working

tl.dr
1. Uninstall DisplayLink driver first
2. go to recovery mode
3. invoke kextcache command as described in that article.

Based on the title I thought this KB article was not relevant, but it fixed the first problem. The extension is now loaded and I have a mirror of my main monitor.

How to switch this from a mirror to a extended screen (as I had before)? Reconnecting the USB doesn't fix the issue. The Airplay icon is not visible and the only option for AirPlay Display is Off.

Do you have latest 5.2.1 DisplayLink driver installed?
https://www.displaylink.com/downloads/file?id=1433

You can easily switch to extend mode in "System Preferences->Displays->Arrangement" where you have to untick "Mirror Displays" option.

At first the new beta driver did not work, but after doing the kextcache, now 5.2.1 beta works :)

Thanks you

I did a couple of uninstall / installs with 5.2.1 beta 2. Mirror displays is unchecked. AirPlay Display says only off in the select list. I see the Air Play icon and that also says off.

I see the two displays extended (directly connected) and the third (DisplayLink) as mirror. No option to extend the DisplayLink monitor.

I have the following setup: 1-2-3. Where 1 is the display link and 2 and 3 are connected to the Mac Mini. Playing around on the arrangement tab:

• When the menubar is on 1, then all displays are extended.
• When the menubar is on 2, then 1 is a mirror of 2.
• When the menubar is on 3, then 1 is a mirror of 3.

I also noticed that I can move my mouse cursor around on the mirrored screen, like it's a actual extended display, but I cannot click on anything! I want the menubar on 2 because this one is directly on front of me.

Any idea?

I also tried 5.1.1, unfortunately it does not work.

Tried to do it this way, but terminal command is not available in recovery mode on my mac which runs catalina.

After the unsuccessful messing with the recovery mode, decided to delete again the software and download again and reinstall, this will be like the 5 time reinstalling last version, and for some reason it works, finally. Nothing I have tried worked, but uninstalling and installing the software did the trick I guess, and that is the latest version available for display link.

I attached an image.

Upgraded to catalina this morning. At first neither of my monitors were working. I followed the steps on the KB articles that have been linked and got it working... well kinda of. My second monitor (which is connected via displayport to my dock) is having some major issues with with distortion, as the picture shows.


Works fine on my windows PC.

Still not working
 

Hi,

I followed the above suggestions, but everything is still not working. I tried uninstalling and re-installing beta driver, trying to install an older driver as suggested in some of the posts, and the kextcache command didn't seem to do anything other than below:

This is the output of the kextcache -I /Volumes/MyDisk command (I renamed my disk to MyDisk for simplicity):

Error returned: <error:0x1076e5060> {count = 1, transaction: 0, voucher = 0x0, contents = "XPCErrorDescription" => <string:0x1076e51c8> { length = 18, contents = "Connection invalid" }
}
KernelCache ID: D5B91AEB124007B9951B6D7FB9F9AEF1

Any further suggestions?