black screen in Catalina

@jgwnyc - No, I believe that most people were able to fix this with the solutions on page 8 where we are removing some of the .kext files and then replacing them after a full reboot.

Detailed fix:

1.. Delete these 3 files from the Library/Extensions/ directory:

MCTTrigger6USB.kext MCTTriggerGraphics.plugin and Trigger5Core.kext

2.. Reboot your machine.

3.. Go to your trash bin and put the files back (it will ask you to authorize them again with your password).

This seems to have worked for the majority of us that started this thread. If you still have problems, try resetting your PRAM by holding CMD + OPT + P + R at the same time when booting up your machine for 12 seconds, then release them at the same time.

I think if you delete those Library files and then put them back after reboot you should be good to go..

I was able to fix the problem, by just coping the extensions out of the directory into a folder on my desktop restarting and then copying them back into the extensions folder (authenticating) and then restarting. All works, and I didn’t have to delete anything.

I'm experiencing another issue related to Display.

I own a MacBook Pro 2019, and attached an external monitor via USB-C. When I first attached it in my MacBook (Mojave) it worked like a charm, then I upgraded to Catalina and experienced the black screen. Now I downgraded to Mojave and the black screen stoped but when my Mac return from sleep, the resolution in external monitor is completely messed, something like 1280 x 720, then I have to open the lid of my Mac and close it again to return to best resolution.

My external monitor is a Dell P2719C, whom used to work very well.

I can attest that this was extremely helpful and fixed my issue.

Detailed fix:

1.. Delete these 3 files from the Library/Extensions/ directory:

MCTTrigger6USB.kext MCTTriggerGraphics.plugin and Trigger5Core.kext

2.. Reboot your machine.

3.. Go to your trash bin and put the files back (it will ask you to authorize them again with your password).

This seems to have worked for the majority of us that started this thread.  If you still have problems, try resetting your PRAM by holding CMD + OPT + P + R at the same time when booting up your machine for 12 seconds, then release them at the same time.

I think if you delete those Library files and then put them back after reboot you should be good to go..

Oh, THANK YOU. This was my situation as well. 4-5 years a go i installed on my MBP this driver because of USB third display, today already 3 years after i have iMac Retina 27 with the same OS history, the drive Trigger5Core.kext was still in Extension folder. After delete and restart, black screen is gone. Many thanks :)

Had that issue a few times, now no longer happening getting something else but more serious. Note that for me my system is only ever going to sleep or left unattended for a long period of time while docked, I can't speak to the behavior when running on battery without external displays connected.

My issue is that I can't reboot and get anything to display UNLESS docked (CalDigit TS3 Plus). If I reboot without being docked, no matter how many times I retry, I will get a black screen. Powering down and then plugging into the dock (which powers on automatically when plugged) will then boot without fail every time. This is really concerning, and very frustrating. If I have to reboot for any reason, or access BootCamp, I won't be able to get back into macOS again unless at home and docked. Tried what was suggested here and moved some kexts, rebooted and replaced, had no effect whatsoever. Same issue as described continues to happen consistently.

Kexts I have (not that I think it matters since moving them an replacing them didn't do jack):

ACS6x.kext

ArcMSR.kext

ATTOCelerityFC8.kext

ATTOExpressSASHBA2.kext

ATTOExpressSASRAID2.kext

CalDigitHDProDrv.kext

HighPointIOP.kext

HighPointRR.kext

HueSync.kext

PromiseSTEX.kext

SoftRAID.kext

ufsd_NTFS.kext

Hoping we, or Apple, can come up with a solution to this quickly as Mojave is sounding better by the minute. Happy to provide more info if this gives anyone any ideas. Appreciate the collaboration in this thread, but wish Apple would be more engaged in these types of discussions as their input would be most valuable vs the pure speculation I see from a few others in here.

This solved the same issue i had after upgrading to Catalina, https://www.reddit.com/r/mac/comments/dfq969/mac_screen_wont_wake_from_sleep_after_catalina/

"In my /Library/Extensions/ folder I deleted MCTTrigger6USB.kext, MCTTriggerGraphics.plugin, and Trigger5Core.kext, which were drivers installed by the j5 software. Next time my computer woke from sleep the display came back without issue.

So my suggestion is, if no solution has worked for you so far, check your /Library/Extensions/ folder for any display drivers. Google the driver name before deleting it to verify it's not something critical, then try deleting and testing."

I have a 2014 MacBook Air running Catalina 10.15.1 and was having the same problem with the blank screen after sleep. I removed the MCTTrigger2.kext file and this seemed to fix the issue. I haven't seen any other collateral issues from removing the file yet but only tried this last night.

For everyone who can't find any third-party extensions that are causing the problem (like me on multiple machines), I can confirm that creating a Time Machine Backup, installing a fresh copy of Catalina and then restoring that backup through Migration Assistant/Setup Assistant WITHOUT restoring "Computer and Network Settings" WILL resolve the issue. Whatever is causing the problem does not appear to be being backed up in the Time Machine Backup. So you don't have to fear that you are just restoring the problematic file and that the problem will resurface.

I installed Catalina from scratch, formatted my HD completely and started over again, and everything seems fine. The only issue I have is... when i'm connected to my external monitor (DELL P2719HC), shell closed, and wake up from sleep, Catalina thinks I have multiple monitors and wake up with login screen in MacBook Pro monitor, then I press esc, it goes to sleep again and wake up in the correct monitor. But, when I undock, all seems well now.

This is the exact solution: copy these extensions in a temp folder, delete the extensions (each deletion to be confirmed by authentication), restart the system, and move them from the temp folder back in. This requires again authentication. After that: restart, and the black screen Problem has gone. No clue why, but Apple should follow this path and find out what is wrong here. During deletion, I had several warnings about these extensions, that they are not properly installed. But as said: deleted and put back in, and that solved the Issue. Finally...

Unfortunately it's not the "exact" solution. The symptom (black screen when on lock screen and never being prompted to authenticate) appears to be caused by several different things. Clearly one of them is incompatible third-party kernel extensions, usually having something to do with an external USB video card or graphics-related extension. I, on the other hand, have three computers in my fleet that are exhibiting this issue without any third-party extensions installed. In fact, I booted to Recovery and removed all extensions from /Library/Extensions and /Library/StagedExtensions via Terminal (since some are SIP protected). This still did not resolve the issue. I also cleared kext cache and various other things.

All that to say, just because the symptom is the same does not mean the root cause is the same. This is basic logic within any form of troubleshooting.

Fair enough and agree. The wording "exact" was more meant as response to the earlier contributor appzattak, as his method solved it on our side as well, compared to all the other tips and tricks which did not solve it. Curious if we ever hear about the root cause of this annoying problem...

Same issue here. I don't have MCTTriggerGraphics.plugin and Trigger5Core.kext in extensions tho.

The funny thing I noticed is, when the screen is "black", you can actually hardly see the windows are displaying, just very very dark.

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