MacOS 13.4 Ventura - External Monitor no longer detected. Worked until the update to 13.4

It's strange what seems to work on some macs and not others. I'm on a 2017 iMac. Nothing worked for me either, but as I NEED a 2nd screen for my workflow - I picked up a new LG 27 in monitor (MN60T) and . . . viola it worked. I have no idea why but I'm just relieved to be past this issue. It could be that some fixes only work with specific monitors.

If you get desperate, maybe pick up the monitor that I did. You shouldn't have to, of course, but when needs must.

I won't be applying any more Apple OS updates going forward until after I determine they have not caused issues for others. The amount of stress this caused, coupled with the lost productivity, have made me far more skeptical of new updates they release.

This:

divinetruth wrote:

I just confirmed my MacBook Air M2 (OSX10.31a) works fine but when my M1 Macbook Air OSX 13.4 is connected to same setup the extended doesnt work. The monitor works but one I swipe screens it swipes both on the laptop and 27inch while in Extended Display mode.

What does mean? One swipe screen? Can you explain?

When I use 3 fingers on the trackpad it changes to my other desktops ( I have many open) e.g fullscreen Mail, next screen could be Safari pages etc.

Now when I swipe on say one screen (Macbook) then the extended screen is also changing at the same time (usually just showing a blank screen) and vica versa on the 27inch screen its connect too.

It's already checked in my MacOS Ventura 13.4. I turned it off and turned it on following the same steps but mac is still not detecting second external monitor. Just to clarify, I am able to see first external monitor but not second external monitor from the time I updated mac to Ventura 13.4.

Anything else I can do?

Hi All, i have the update as well. I have the MacBook Air with 2 external monitors connected that were working fine up until the update over night.

The main display and the 1st external we were working and the 2nd external wasnt.

I have restarted the machine many times and followed a few of the solutuions. After all this, now the 1st external monitor is not coming on.

Any one have a solution?

My Studio Display arrived today and it isnt connecting to either my air or pro, both on latest ventura OS, its powered on as its charging my laptops, just isnt displaying as an option in the display settings... ive tried everything!!

The whole point of sticking with apple was so I can just plug and play, and this is what I relayed to my manager when making a case to expese it, pretty embarrassing now if ive to go to IT!

I'm using 16" M1 macbook pro plugging a portable 16" external monitor.

I tried to plug all the interfaces on monitor out and reconnect it again. However, I see my external monitor come up and down repeatably on display settings menu. Nothing changes.

I hope apple gets back my monitor.

claire_murph wrote:

1. So it finally works! Designers need to go back and reconsidering the UX/UI.

a “tiny” modal appears to ask you to connect the external monitor! I overlooked it completely, navigated away!

Either give 2 points of entry as is, or:

make a bigger modal and disable navigating away

2. allow the user to give permissions to connect via the display settings.

What "tiny modal" is this? Is this related to DisplayLink?

It would be useful to see a screenshot of that.

I read all the comments, incl. the DisplayLink one. I installed their package but that did not work for me. I am using a KVM from Amazon (I had to try 3 different ones to find one that even worked with my M1 MBP and the Asus ProArt screen).

Read all posts, nothing helped. MacBook Air M2, tried two docking stations (Dell and HP G4), reinstalled DisplayLink. Both displays are functional but only in the mirroring mode, extension is not possible.

Hi KiriKuru -

Is this the same thing? It doesn't show the part from and after the .display . . . so I'm not sure I have the right thing here but I don't see anything else close to it:

If not, can you provide guidance on how to navigate to the correct .plist, I would be eternally grateful.

You got to be joking! It’s the same hardware just a new software update on the Mac. No hardware changed.

Apple, I just updated my MacBook Air m2 at work and the same thing happened as with my MacBook m1. Screen works but I get black screens on some spaces as I change spaces.