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Or, if you’re really motivated, perhaps look into solving the problem in hardware with an EDID emulator.
#Mac extended display emulator mac
If you’re in this unenviable position - a problematic display with an M1 Mac - you might have no choice but to shop for a new monitor. This may be the last hurrah for overriding EDIDs on MacOS, though, if Apple doesn’t decide to make it work on ARM Macs in the future. I hope that this post is useful for anyone dealing with this now several-year-old problem on Big Sur.
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The StepsĪs of MacOS Big Sur, here’s how to override your display’s EDID to force RGB mode: Unfortunately, it looks like the workaround doesn’t work on M1 macs. But I see reports of success ( here and here), so I’m going to go with “yes”, at least on Intel Macs. I can’t say firsthand, since I no longer have the problematic monitor. I learned about it from this developer.apple thread.įor more specifics on Big Sur’s changes to MacOS’ System volume, see Ars Technica. Just sudo.Īs with the old workaround, I don’t deserve any credit for this discovery. Instead, you can put them in /Library, and you don’t even have to use recovery mode to write them. Though MacOS’ built-in overrides still live there - specifically, in /System/Library/Displays/Contents/Resources/Overrides - it’s not necessary to put your new overrides there. Since then, Apple has continued to tighten security, and it’s no longer practically possible. One thing that made the old workaround so absurd was that you had to bend over backward to write to the protected /System directory. Is it still possible to perform the workaround?įortunately, yes! With one small change. Googling around, I see evidence that people are still trying to force RGB on MacOS 11 (Big Sur), and that the previous version of the workaround no longer works. Comments on the original post suggest that the workaround was necessary and successful on 10.14 (Mojave) and 10.15 (Catalina). I first encountered the issue on MacOS 10.13 (High Sierra). To help anyone landing here in 2021, I set out to answer a few questions: 1. I no longer have the problematic monitor, but the post still receives a fair amount of traffic, so I wanted to check if the procedure still works. It turned out that my new Mac was using the wrong color space, but there was a workaround to force it back into RGB. BackgroundĪ couple of years ago, I wrote about a strange problem I encountered when I upgraded my Mac: my external display’s image looked terrible. As of MacOS 11, it’s still possible to override your display’s EDID in order to force RGB mode when you get a problematic YCbCr connection, at least on Intel macs.