MacBook won't detect external display

Same problem, my AOC monitor no longer works with my 2013 Macbook Pro, using VGA to HDMI cable.

Hi

Did you get any reply on this?

Having same issue.

/Zihni

I’m in the same boat. I cannot connect to my external monitors now that I’ve downloaded High Sierra. Apple needs to fix this huge bug immediately!

Genius bar says they can reverse the update until engineering finds a bug. I need my other monitor. Nevertheless, it was a great learning experience in Apple tech.

This was helpful as the display is working again but it only clones the screen and does not do mirror display grrrr.

Thanks alejandroveedub! This worked for me too!

tongue in cheek Lanny... ...just sending that out into the universe

Thanks though for the tidbit - I'm be more buttoned up next time.

Updating the DisplayPort driver might help:http://www.displaylink.com/downloads/file?id=1085

Sorry I should have been clearer. It actually works with High Sierra. I probably spent about a month now trying to find different solutions and only two things work for me. Buying this adaptor or rolling back to Sierra, but that depends if you have kept a a Time Machine backup to restore to. I have a Acer 27" G277HU which is running at 60Hz connected via HDMI. I can't comment on individual monitors though but know that after much frustration I finally have found something that seems to work now. To be honest I don't see why I actually had to spend anymore more money given that it appears to be a problem with the operating system. Truth be told I suspect Apple want people to splash out extra cash on their LG partnered monitors which connect directly via USB-C.

I also downloaded the newest version of Display Link (http://www.displaylink.com/downloads/macos), ran it, restarted computer and it's working! The background on my MacBook screen changed, not a big deal in order to get my external monitor working again.

This is driving me nuts!

I finally convinced my employer to give me a Mac.

Working in a company with 40.000 employees this is the first Mac in the company.

I did my homework and found that our standard supplied Dell D6000 USB-C dock should work just fine, so I ordered a brand new MacBook Pro 13" with Touch Bar.

Very happy about my new macbook, but then at first I found out that the DisplayLink port on the D6000 dock is no longer supported on High Sierra, so I'm left with only the HDMI port.

Fine I then decided to order a 27" monitor since I though I could live with just this then.

(Company standard Lenovo ThinkVision P27q-10).

BUT that is not working either! The MacBook detects the screen when it off, but as soon as I turn it on it disappears from the Display settings!

It does work with my former Samsung 22" screen.

How can it work with one HDMI screen and not with another?!?!

SO unhappy about this now!

I am using two of these dongles from UGreen (there are others with different configurations if you don't use VGA plugs for your monitors) now since Apple no longer supports any DisplayLink chips or drivers externally connected to their devices.

Each dongle connects to the computer via USB-C. Each has a VGA, USB-3 and a USB-C female port. Currently, my set up still uses my docking station, which allows me to connect to my ethernet. One dongle has a VGA male plug (my first extra monitor) and USB-3 male plug (the docking station connected to my ethernet), and the other dongle just has a VGA male plug (my second extra monitor).

This is possibly one of the dumbest bugs Apple has ever tried to pass off as a "feature" in an update. It makes no sense whatsoever, except that it forces us to buy more Apple products to make our thousands-of-dollars computers work.

Also, it amazes me that none of the Apple support staff have been updated on this. When I connected with a "genius," he spent 20 minutes of my time proving to me that my docking station was "working fine" by making me plug my phone into it and finding other USB-3 cords I could plug in to prove that it was a working piece of hardware. He was super condescending, and spoke to me saying things like, "[Insert my name], you see now? There is no way the docking station couldn't be working." I asked him what else it could be and he told me to reinstall the OS (which, I might add, would have been the fourth time doing so since I got this computer in November of 2017 due to errors associated with Apple updates).

Immediately after my conversation with the Genius, I looked on Plugable's website and found, highlighted in red at the top of the page, a big article about their docking stations not working. So we played right into Apple's trap, bought two of their "certified" dongles, and now I'm badmouthing them every chance I get.

Same problem after High Sierra update.

21,5" iMac (late 2012) with external HP Pavilion display connected with thunderbolt/HDMI adapter.

Very very annoying!!

is the display link site third party? have you had any issues since the download?