External monitor problem iMac 2017 High Sierra.

I tried running that, and it said my disk didn't meet the minimum requirements. Of course it doesn't tell you what those are and why my drive was good enough for High Sierra but not this update? Come on.

Same problem after update MacBook Pro 2017 to macOS High sierra and connect Samsung 27” 4K curved the mouse freeze for 3 secs and moves only for 1 sec.... basically impossible to do anything on the computer!!! Frustrating! How it’s possible to spend $5000 for a laptop and after an os update be unable to work! I’m losing money and time at work because of this...

The question is: who’s going to pay?

Is Apple checking and testing the updates before they are getting released? I don’t think so but is time for Apple to release a patch for this issue in no time before the entire globe goes crazy!

Please fix it ASAP

Unfortunately, not from my (our) knowledge. Let's hope that they will come with an update soon... As usual, Apple doesn't communicate about their failures. I learned my lesson: next time they come with a major upgrade, I will wait for a couple of months and check the users' discussion posts before doing it.

I have three external monitors attached to my MacBook Pro. I upgraded to High Sierra this morning and now two of them don't work. I need to go back to Sierra because I need my three monitors. How do I do that?

I have the same problem with a TV.

The monitor worked for some time, but in an instant it turned black and now I can't get it to display anything. The Macbook detects the TV in the monitors section of the Preferences panel but the TV shows "No signal".

I got the problem fixed momentarily by reinstalling Mac OS, but then it happened again.

When my Mac is connected via HDMI to the TV by mouse usually hangs for a second or two every few seconds.

I don't have this problem with an HP monitor I'm using, at least it didn't happen until now.

Running two external screens worked fine on my MacBook Air on last version of OS. Installed High Sierra and now only one external monitor works. It works using display port to HDMI adaptor, but a second one will not work using USB to HDMI adaptor. Wasn't a problem before installing High Sierra.

Biotherapeutics,

I am using a late 2013 27" iMac and tried the NVRAM reset a couple times without any success. "cmd-alt-p-r" on startup waiting to hear opening sound a second time a bit louder. I then connect ext. monitor via "USB-C - HDMI" "thunderbolt - HDMI" adapter and then the iMac goes blank with the mouse pointer. If I unplug ext. monitor from power source I get iMac display back.

I've tried the reset a couple of times now. Not having my ext. monitor is costing time and I'm about to go back to Sierra again through time machine because this extra monitor is nothing more than a paper weight sense the High Sierra upgrade.

Any suggestions appreciated =-)

Similar issue here. Got a Macbook Pro 2017 13-inch yesterday with an Apple multiport Thunderbolt adapter (HDMI, USB, USB-C). The external Dell display turns black arbitrarily and I have to re-plug the HDMI several times to make it work again until it happens again in 10 minutes or hours. I've spend the whole day trying everything mentioned in this thread, like NVRAM, SMC, DisplayLink, reinstalling the OS. Nothing helps.

This not quite the premium experience I expected.

Same issue here with 10.13.1 on a late 2013 MacPro. Using a second monitor is unreliable. Sometimes, even plugging my Thunderbolt backup drive into the computer shuts down the monitor. The monitors are also unreliable when waking from sleep. They just stay blank and it appears that the machine has crashed, but I'm pretty sure the Thunderbolt bus is just taking a powder. It doesn't really matter, a reboot is still required.

Apple really messed this one up. High Sierra (even 10.13.1) seems unstable for anything other than an All-In-One Macintosh without a second monitor. I wish I could revert to Sierra, but with the filesystem change, that's really not an option.

Apple should have discovered these problems in testing, but the reality is that their focus and resources are mostly dedicated to the iPhone and iOS.

I have been running successfully 2 external displays (Samsung S27C750) for over a year from a 13" MacBook Air: 1 linked via USB to VGA adaptor and the other from the standard DisplayPort with HDMI adaptor.

I have then added a Thunderbolt dock in-between, running for 3 months without any problem.

I just upgraded from Sierra to High Sierra... The USB to VGA is not working anymore! I wish I did not upgrade!!! I now lost half of my desktop!

Same issue on Mac Mini - I used to have three monitors hooked up to my Mac Mini - two through Thunderbolt, and one through a USB to HDMI Adaptor (Coredy MDA 1920). Worked Great based on this: thunderbolt - Hook up 3 monitors to Mac Mini Late 2014 - Ask Different).

Talked to Apple - reset NVRAM, that didn't work, so all they could say after that was that the mac mini only allows two monitors and there is nothing they can do about it.

I'm looking forward to a solution!

I have a MacBook Air and up until updating to High Sierra I was successfully using two external monitors without any problem. Really frustrating that after updating I go from 3 monitors at work to 1! I am trying to downgrade back to Sierra to see if that resolves the problem. However, Apple really needs to fix this STAT!

Can anyone provide the date/version of the driver? I've tried this one before, but with no success...and still no success. I uninstalled and reinstalled as well but still staring at a black screen. Thanks for anyone that can help.

Tim

Hi d3vinda,

Do you think this DisplayLink driver could also work for devices that don’t require it? My external monitor is a Dell and there are no drivers for Mac on their website. The dock I’m using to connect it via an Apple VGA to Mini DisplayPort adapter is the OWC Thunderbolt 3 dock. They don’t have any drivers that fit this need either. I can successfully use my Dell monitor with an HDMI to USB C adapter plugged directly into the right side USB C port and it wakes fine. I was just hoping to be able to leave that port open and just utilize the Mini DisplayPort on the T3 Dock.

Should I just try and install DisplayLink driver anyhow? Or would it be useless to me? Thanks for your help.

Yes I have the same issue. Second display was working fine until upgraded to High Sierra.... I have a AOC connected via display/thunderbolt to HDMI on the monitor.

I have tried multiple restarts, unplugging the cable etc.

I was literally on my way to buy a new monitor, but i don't think that will help by the sounds of everyone else issues.

Come on Apple, lets get this sorted quickly - need my extra desktop space....