Display Issue - Horizontal blue lines in application windows

o, so here is what i found out. The problem is solved when you disable hardware acceleration in the settings of all the apps with this issue. like chrome, safari, Franz, and all other having the option to disable hardware acceleration. Not desired, since videos lag or just not perform as you might expect from a 2600 euro laptop.

This issue is thus related to the video card in the system or the drivers, will call apple support for a solution.

did a new NVRAM reset calling with support. It took longer now to restart, aparently it is important the keys are pressed immediately after restart and be held untill after you see the apple logo. Some fan noise the first minute which is now ok and overall it seems fixed. Will update here if the problem is not fixed, no news is good news.

the only thing was the macbook made a lot of fan noise, but after this mds worker thread was done after a minute or two it returned to normal. Everything is the same as before the nvram reset, only no more blue lines :)

I experienced this issue in both Chrome and Microsoft Teams (blech!). Disabling hardware acceleration appears to have fixed the issue but I would still like to see Apple address this issue as Catalina has seems to have been rushed out to production perhaps a bit too soon..

To fix in Microsoft Teams:

Click your Username/Icon in the upper right corner and select Settings. The popup modal after that has a checkbox under Application: "Disable GPU hardware acceleration". You will have to restart Teams after that but that should quash your troubles..

This, in combination with also disabling hardware acceleration stopped the crashing from occurring. Thanks for the tip, thought my computer was on the blink, relieved to find out it's a software glitch!

I have the same issue; chrome, MSTeams, WhatsApp & safari are all affected. I didn’t see this post, and exchanged my 16inch MBP for another one however, the issue is still persistent on the replacement.

Clearing NVRAM does nothing. Disabling GPU on MSTeams caused it to freeze so it is also pointless.

I have also noticed that it happens only after the display is woken from sleep, if that helps anyone in the short term. I was convinced it was the hardware however we all have different graphics cards.

Apple really needs to try to resolve this issue.

ra1fee wrote:

I fixed the issue by;

1) Type chrome://flags in URL bar

2) Locate the following entry "Metal"

3) Make sure it is set to "Enable"

4) Restart browser.

Thanks, @ra1fee!

Your steps…

"chrome://flags" → "Metal" → "Enabled" → (restart browser)

…solved the issue for me.

Cheers!

🤓👍

As mentioned above, I was having the blue line issue first. but later also realised it was constantly restarting overnight.

A week or two after I reported the blue line issue, my MB didn't turn on anymore after what I assume must have been an automatic update to MacOS 10.15.4. I had to send it to the repair shop and they had to replace the motherboard.

I don't have the blue line issue anymore, but the MB still restarts itself overnight when I put it to sleep. Now I'm shutting it down every night instead.

I have to say I'm a bit disappointed as I didn't experience any of these issue with my previous MBs. Really hope it's just a software (and not hardware) issue they'll be able to resolve soon.

I'd still recommend not to update to 10.15.4 as this has reportedly bricked some other people's MBs recently as well, not only mine.

I don't know about everyone else here, but I'm getting pretty sad that I spent $3k on a computer, and Apple doesn't even have the decency to respond to an issue like this. #notwinningatcustomerrelations #firsttimetoeverconsideraPC

So I have an older "Apple LED Cinema Display 27-inch (2560 x 1440) AMD Radeon Pro 5500M 4 GB graphics" external monitor hooked up to my computer all the time. I'm starting to wonder if this monitor is somehow causing this to happen? I'm also using a cheeper dongle to attach the monitor. What kind of monitors and dongles do other people have hooked up? Does this happen to anyone when there is no external monitor?

Yeah, would like to update that after working for an hour or so it's just blue line freezing, crashing and restarting in cycle now. I've had to switch to my wife's Windows laptop, may not switch back now haha. Not the best outcome

Thank god I found this threat! I also have the same issue, mostly with whatsapp desktop app and yesterday also had it with youtube (firefox browser)

New 16 inch macbook, bought one month ago..

I was already scared there might be a problem with the graphic card ..

Apple, please help...

Reinstalling the OS might have helped. I did that yesterday and left the computer on overnight. It didn't restart like it normally does and I haven't seen any blue lines yet. Keeping my fingers crossed.

Also another data point, I worked in safe mode all day the day before (painfully slow) and never saw a random restart or blue lines. I think that's supposed so suggest that it isn't a hardware problem? Anyway, for what it's worth.

Hi all, I chatted with a representative and Apple. He said that they are aware there is a problem and they are confident it's not a hardware issue. I do believe it's caused by the last update and are working on a fix for the next release. If the issue continues after the next update, then I (we) should definitely contact them again. Meanwhile, there are a few things we can do to minimize the inconvenience.

1) Shut down your computer instead of letting it sleep over night.

2) If putting you computer to sleep, unplugging it, wait a few, put it to sleep, then plug it back in.

3) Turn off "Enable Power Nap" in both the Battery and Power Adapter tabs in the Energy Saver in Settings.

4) Turn off "Prevent computer form sleeping..." in the "Power Adapter" tab (in the same place).

5) Turn off the "Enable Power Nap..." in the "Battery" tab (in the same place).