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It's true. Under MacOS, one of my displays flickers 3 times when I turn it on, the other one twice. Somewhere along the way, we made a wrong turn.


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This is an area of macOS that's gotten slightly worse over the years. It used to work much better than that, even El Cap used to flicker only once.

They know that their software/hardware is buggy for three years, but blaming others is easier than admit they made mistake.

Other monitors work without flicker in Intel Macs, and suddenly M1 Macs have flicker issue...

Solution: "Buy Apple Display"


Lots of people also complain about weird flickering on their M1 Macs.

https://www.reddit.com/r/Monitors/comments/s36bam/very_weird...


MacOS is perpetually losing the physical position of my displays. 95% of the time I plug my laptop in the display layout swaps them. I would understand if it was 50% of the time, although I'd still be frustrated, but the fact it happens reliably is beyond me.

Been using multiple monitors with macOS for at least a couple decades at this point. I switch back and forth between macOS, Windows, and Linux regularly—so I don’t feel like I’m missing out on experiences from other OSs. My macOS setup is completely stock these days. I don’t see what the problem is, could you elaborate?

I have five monitors. When it works, it's great. The other 5% of the time it's a giant pain in the butt. I don't know why this part of macOS is so incredibly buggy. It often forgets the arrangement, the HDR setting, and the refresh rate.

I wrote a little program to detect when it breaks and set it back, but they don't have APIs for refresh rate and HDR so it's only a partial fix.

I've half a mind to take a job there, fix it, and quit.


> On my work issued M1 Studio for example my displays

Do they behave any better if you only have one plugged in at a time? MacOS seems to have problems with multiple identical displays.


I'm going to suggest again that Apple still has stuff to do here. For example, on another setup I have 2 very different monitors, 38 inch wide 3840x1600 LG and a BenQ 32" 3840x2160. They don't have the swap problem but MacOS just screwed up and even though I have the BenQ set to Scaled at 2560x1440, MacOS just put it at 3840x2160, and, when I went to go fix it, System Prefs showed it set to 2560x1440. To fix it I had to pick another resolution and then set it back.

There's clearly work to be done on Apple's part here.

Another common problem I have is switching from no external monitor to external monitors. Usually the process is I'm on my laptop on battery. Close the lid. Come home. With lid closed plug in monitors one via USB-C, the other via a Thunderbolt dock, tap an external keyboard to wake it up.

Quite often (once a week?), MacOS never switches on. Often I open the laptop and MacOS flickers all 3 monitors and never recovers (have given it several minutes). Unplug the monitors and there's an 80% change the laptop monitor will come on. Re-plugin the external monitors, wait for them to come on, then close the laptop. The other 20% of the time the Mac never comes on and I have to hold the power button to hard rebooth. This happens on both a 2019 Intel/AMD MBP and an M1 Max MBP. This situation also happens with the 2 identical monitors but the swap probably happens multiple times a day where as the "it can't get itself started" problem happens once a week.


> Dual monitors swapped positions

It’s can happen even when both monitors are not the same and it only ever happens in macOS. Never a problem in Windows nor Linux.

Thankfully Apple seem to have fixed the issue in a relatively recent macOS update but it was super annoying for years.


Just want to note I have similar problems on MacOS especially when using multiple monitors. I.E. one monitor will work and the other won't until I restart.

I have two monitors connected to M1 mac.

One works perfectly fine and is automatically RGB. Other flickers and when changing to RGB mode it is lime green.

Wonder why it is not problem with Intel Macs and if M3 fixes those bugs?

Maybe it is Apples feature to sell more of their own monitors.

They make sure other high end brands do not work with macOS.

It does not make sense that this kind of bug is 3 years active.


Can you elaborate? I have this problem every day.. macOS just seems incapable of remembering my display arrangement.

Just curious, did your monitor flicker randomly when changing screen content and while connected to a MacBook?

Literally all of my issues revolve around display issues. I honestly don’t understand how developers at Apple don’t fix these things... If I am getting up/down from my desk throughout the day and plugging in and unplugging a monitor, sometimes my screen is just _stuck_ black and requires a hard reboot. Other times, it shows the login screen on both monitors. Yet other times, it decides it didn’t actually detect that monitor.

Most folks on my team have the same deal to differing amounts. We don’t use any special software.


Should this be the case with a Macbook, even if a sorta old one? Because that's the machine I've seen the flicker on, for the past bunch of years.

This actually used to be a common problem I would have on macOS, especially when docked to an external display. I wonder if these problems are connected somehow.

I can't get over how badly MacOS works with external monitors; I have a fiddly 5ish minute Mac boot cycle process somedays because there it just refuses to output anything.

It has been the opposite for me since about Windows 7.

Work MacBook - have to restart it to get USB ports to work, screen flickers when you plug in an external monitor like X windows on an Unix terminal from '99 with a bad conf file... Comeon.


> But when I turn off my displays that are on HDMI or DVI or VGA, the computer still detects them like normal, like they're connected, because they are.

But since they’re off, that doesn’t make any sense, now you can’t reach any windows on those monitors. I think the macOS behavior make the most sense, move them so you can access them, but move them back once the display is turned on.

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