I did browse the net for some half a day reading various options.Watch the Video Tutorial 4K Display at 60Hz Checklist Also display preferences shows HDR checkbox - after unchecking HDR the colors are ok but of course no HDR so color stripes can easily be observed on a large area gradients. I wonder if HDR is possible in my case on LG 27UN83A with macOS/MBP16 2019Īfter connecting first time using the USB-C I did notice HDR icon on the LG and then the famous "washed colors" / poor contrast image. ![]() Is this right? I'm very new to this kind of stuff, so I'm wondering why I haven't experienced this issue with other large TVs that I've used as monitors? I've been lead to believe that the problem is that the macbook is sending a 4:2:0 signal to the TV, and this would be fixed if it were sending a 4:4:4 to the TV. There's a lighter coloured halo around the text that makes it look really blurry and hard to look at. Brightly colored text on white background (like green or blue that you'd have in a coding environment) looks absolutely terrible. Black text on white backgrounds looks fine and plenty crisp. Text looks like garbage, and I'm pretty surprised and disappointed. I have the CX's input on PC mode and I'm using an HDMI 2.0 cable to connect the macbook to the TV via the Apple Multi A/V Adapter (the one that goes USBC to HDMI, USBA and USBC). I have a 16" macbook pro with the 5500M 8GB. Hey so, I just got a 65" CX OLED that I've been using with my MacBook and googling the problem I've been experiencing lead me here. Need to compare what the Apple adapter gives compared to the club-3d adapter.ĤK 120Hz possibilities (assuming 1188MHz): Maybe there's an EDID override that can get that to work. I've only seen HDR get enabled with Apple adapters. You can zip the AGDCDiagnose files and post them here so we can see what's going on.Įven if you get the right color, I don't know if HDR will work. The listedids command will show all the EDIDs (duplicates are grouped together). The files can be loaded by EDIDUtil.sh script using this command loadagdcfile AGDCDiagnose*.txt. The files will show if DSC is enabled or not. System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/AGDCDiagnose -a > AGDCDiagnose_a_port1.txt 2>&1 I've got a script at to help examine and modify EDIDs.įirst, get the connection and EDID info of each port of the display (and also any settings that might modify the EDID) using this command (do it in Catalina and Big Sur change the file name to describe what port and/or setting of the TV it is for): SwitchResX does not have features to override the color info, so you'll have to do it using a different utility. You may need to edit the EDID to get that. If DSC is not working (may be a problem with Big Sur - did you try Catalina?), you should still be able to get 422 10bpc or 420 10bpc. EDID overrides don't work except if you just want to change the display name. UPDATE: I changed the HDMI input to be labeled as PC in the TV's settings, based on further reading, but this didn't offer any benefit.Ĭlick to expand.4K 120Hz possibilities (assuming 1188MHz): The Apple TV seemingly has better display support. I'm at a loss here and confounded by why Apple makes this so difficult. Do I need to mess with SwitchResX in order to get YCbCr 4:4:4 and HDR? I do have deep color enabled for that input on my TV. ![]() Is there some sort of plist hack, EDID override, or something that I need to do even to get full YCbCr444? Before I even consider 120Hz, getting the color correct is the first order of business. On the Mac, there's no way to change anything in Display Settings (not the resolution, the refresh rate, the color depth, or HDR), but the scaling. Diagnostics on the LG TV reports it as "YCbCr 4:2:0 10-bit TM". When did Windows become the platform that stuff just works? This same setup works flawlessly with my work PC laptop with Thunderbolt3 outputs. I use a Cable Matters 48Gbps Thunderbolt3 to HDMI 2.1 adapter. My current monitor is the LG 48CX OLED TV, which has HDMI 2.1 inputs and supports w/ 10-bit HDR. I'd be content getting either one of them to work properly. I have both a 16" MacBook Pro and an M1 Mac Mini. And even then there's little discussion about how to actually get it to work beyond the discussion of the theoretical hardware and cable support. A lot of discussion exists on getting 4K 60 or 120Hz with 10-bit HDR and 4:4:4 chroma subsampling (YCbCr444) with an external monitor, but seemingly mostly on the M1 forums.
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