High Sierra + External Monitor

AdumbusPrime wrote:

No, they occur since High Sierra's launch. My monitor is a Thunderbolt Display, and it's not worked since I upgraded.

Then your problem is not the same as the OP's as his workaround would never work.

The displaylink driver is for those docks out there that connect over USB-A and offer a display connection, such as HDMI, *on the dock*.

It is not used by a direct display connection.

The displaylink issue is very well known and started with 10.13.4.

I don't know why your display is not working for your since 10.13, but did you try:

- resetting the NVRAM and SMC

- starting in Safe Mode

- logging in to a different user account

- doing a clean install on a separate drive

You may also want to run Etrecheck and post its report, so we can have a look at possible software conflicts.

External display issues occur only with these devices that depend on displaylink. That uses nonpublic APIs to drive displays over USB. If you connect your display in a supported fashion it will work just fine (miniDP, HDMI, Thunderbolt all work perfectly just as they always have; video over traditional USB was never officially supported in macOS).

Hey Luis,

Thanks very much for your last post, resetting the NVRAM worked for me and I'm happily writing you, with my Thunderbolt Display working.

The report indicates that you have adware installed.

Rerun Etrecheck and follow the indications to remove it.

It does not seem like that would be related to the current problem, though.

Hello again Luis.

My mac isn't recognizing my display again when I plug it in.

I've tried Resetting the NVRAM, the SMC and restarting in Safe Mode. I also logged in as a guest user.

I haven't done a clean install or tried the monitor with a different computer.

I did run a Etrecheck and will post it below. If you've got some time, it would be amazing if you could have a poke around it and see if there are any red flags.

Thanks again for your help.

EtreCheck version: 4.3.1 (4D024)

Report generated: 2018-05-27 12:19:24

Download EtreCheck from https://etrecheck.com

Runtime: 3:17

Performance: Good

Problem: Other problem

Description:

When I plug in my Thunderbolt Display into the port, my mac doesn’t see it/use it.

Major Issues:

Anything that appears on this list needs immediate attention.

No Time Machine backup - Time Machine backup not found.

Adware - Adware detected.

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Unsigned files - There is unsigned software installed. They appear to be legitimate but should be reviewed.

32-bit Apps - This machine has 32-bits apps that may have problems in the future.

Abnormal shutdown - Your machine shut down abnormally.

Hardware Information:

MacBook Air (13-inch, 2013 - 2014) / MacBook Air (13-inch, Mid 2013)

MacBook Air Model: MacBookAir6,2

1 1.7 GHz Intel Core i7 (i7-4650U) CPU: 2-core

8 GB RAM - Not upgradeable

BANK 0/DIMM0 - 4 GB DDR3 1600 ok

BANK 1/DIMM0 - 4 GB DDR3 1600 ok

Battery: Health = Normal - Cycle count = 20

Video Information:

Intel HD Graphics 5000 - VRAM: 1536 MB

Color LCD 1440 x 900

Drives:

disk0 - APPLE SSD SM0512F 500.28 GB (Solid State - TRIM: Yes)

Internal PCI 5.0 GT/s x2 Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 500.07 GB

disk1s1 - Macintosh HD (APFS) 500.07 GB (419.45 GB used)

disk1s2 - Preboot (APFS) [APFS Preboot] 500.07 GB (21 MB used)

disk1s3 - Recovery (APFS) [Recovery] 500.07 GB (518 MB used)

disk1s4 - VM (APFS) [APFS VM] 500.07 GB (1.07 GB used)

Mounted Volumes:

disk1s1 - Macintosh HD 500.07 GB (78.85 GB free)

APFS

Mount point: /

Encrypted

disk1s4 - VM [APFS VM] 500.07 GB (78.85 GB free)

APFS

Mount point: /private/var/vm

Network:

Interface en2: Thunderbolt Ethernet

Interface en4: Display Ethernet

Interface en5: iPhone

Interface fw0: Display FireWire

Interface en0: Wi-Fi

802.11 a/b/g/n/ac

One IPv4 address

Interface en3: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

iCloud Quota: 126.46 GB available

System Software:

macOS High Sierra 10.13.4 (17E202)

Time since boot: Less than an hour

System Load: 1.82 (1 min ago) 11.05 (5 min ago) 11.77 (15 min ago)

Security:

Adware:

Launchd: ~/Library/LaunchAgents/com.spigot.ApplicationManager.plist

Reason: Adware name match

Executable: /Users/***/Library/Application Support/Spigot/ApplicationManager --protect

Unsigned Files:

Launchd: ~/Library/LaunchAgents/com.valvesoftware.steamclean.plist

Executable: /Users/***/Library/Application Support/Steam/SteamApps/steamclean

Details: Exact match found in the whitelist - probably OK

32-bit Applications:

15 32-bit apps

System Launch Agents:

System Launch Daemons:

Launch Agents:

Launch Daemons:

User Launch Agents:

User Login Items:

Backup and Sync Application (Google, Inc. - installed 2018-04-12)

(/Applications/Backup and Sync.app)

iTunesHelper Application (Apple - installed 2018-04-05)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins:

AdobeAAMDetect: 3.0.0.0 (installed 2018-05-02)

QuickTime Plugin: 7.7.3 (installed 2018-04-05)

3rd Party Preference Panes:

Backblaze Backup (installed 2018-01-29)

Time Machine:

Time Machine Not Configured!

Top Processes by CPU:

Top Processes by Memory:

Top Processes by Network Use:

Top Processes by Energy Use:

Virtual Memory Information:

Software Installs (past 30 days):

Diagnostics Information (past 7 days):

2018-05-27 12:06:29 Last Shutdown Cause: 0 - Power loss

End of report

Same issue for me but your work around didn't work for me. Despite that, thanks for posting!

No, they occur since High Sierra's launch. My monitor is a Thunderbolt Display, and it's not worked since I upgraded.

Yeah, I removed it, a nice bonus.

I plugged in my display this morning and it worked, so the issue is certainly intermittent.

Thanks again for your time Luis.