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Hi there,

I was able to connect Japannext GX28 monitor (JN-280IPS144UHDR-C65W) to my mac studio (M1 max) using the usb-c-to-c cable provided with the screen and configure settings to use 4k hdr 144hz. My mac is on Ventura's latest beta.

https://japannext.net/gx28/

Hi Nikita,

I know your post is over a year old, but it's the 2nd link on Google Search on this issue and I figured I wanted to give it an update in case people were buying hardware based on that page.

I was under the impression that Apple broke DSC upon upgrade from Catalina to Big Sur and Intel Macs are only able to output 4K@60Hz regardless of hardware capability. I have been trying to get my 2019 i9 5500M 4GB MBP to work with a Gigabyte M28U and it is not working (USB-C to DP 1.4, USB-C to USB-C). Both cables and setup work flawlessly on the same hardware running Bootcamp Windows 10 (up to 4K@144Hz). You have my setup listed as green on your blog, but there are multiple reddit posts of exactly this issue I described with no solution, even years after Big Sur was released. Do you know if the was on MacOS Catalina, or is there a specific cable to get this to work?

Tony

I couldn't figure out where I should add the data to make a pull request so I decided to make an issue instead. Please add some instructions as there's a lot of code unrelated to display compatibility!

Without further ado:

The Samsung G70A 28" 4K 144 Hz display does NOT work with the 2019 Intel Macbook Pro at above 4K 60 Hz speeds.

Tested using a CableMatters USB-C to DP 1.4 adapter and then a DP cable connected to the monitor. I also tested this same adapter through my PC's 2080 Ti's USB-C port and get full 4K 144 Hz so the limitation is entirely on the Mac.

🥹

I had trouble finding a link to your new blogpost because the link to it is missing from your 'blogs' page.

Is the title enough?

hey just leaving an update about compatibility;

I've tried this combo:

• Intel i9 iMac 2020 with Radeon Pro 5700 XT
• Asus PA32UCG monitor
• connected via Thunderbolt cable (40Gbps) provided with the Asus monitor

Unfortunately it does not seem to work. Here's my system info - it doesn't show the 120hz offering like the screenshot you provide on the website.
https://drive.google.com/file/d/15k4a1o9weXrzaCXmWO9XhnhWcOct0BPk/view?usp=sharing

Side-note; you don't have any mention of iMacs on the website - is it known that Intel iMacs will never support 120hz? Would be good to share more info it's available. This website suggests it's not possible https://everymac.com/systems/apple/imac/specs/imac-core-i9-3.6-10-core-27-inch-retina-5k-2020-20-2-specs.html
quote from the everymac site; "*This model can simultaneously support the internal display at full native resolution and up to one 6016x3384 (6K) external display at 60 Hz with support for 1 billion colors; one 5120x2880 (5K) external display at 60 Hz with support for 1 billion colors; two 3840x2160 (4K UHD) external displays at 60 Hz with support for 1 billion colors; or two 4096x2304 (4K) external displays at 60 Hz with support for millions of colors. It supports both extended desktop (second workspace) and video mirroring (internal display duplicated on the external display) modes."

Thanks,
Simon

For some monitors, the supported set of features around scaling is different. I think it’d be great to add this as an optional(?) screenshot to newly created issues.

E.g.

(source: my machine)

Vs

(source: https://www.eizoglobal.com/support/compatibility/dpi_scaling_settings_mac_os_x/)

MacBook Pro (13 inch, 2019) with Acer XV273KPbmiipphzx has refresh rate of 30 Hz maximum.

I have 4k 120hz with HDR on 2021 LG C1 48in working on my 2019 16in mbp.

HDR signal

Bootcamp windows

All supported refresh rates at 3840x2160

Working hdr only at 60hz on windows. macos is allowing 4k 120 with hdr
HDR/SDR brightness balance slider is also working

Hey Tonsky,

Thanks for your work building the monitor compatibility list, it helped me out when selecting monitor for my Mac Studio. I've never really done a PR and couldn't quite figure it out, I assume I needed to fork the repo but that seemed like overkill just to pass on information for new compatibility.

Anyway, Mac Studio M1 Ultra is working a-okay with 2x Gigabyte M32U Displays at UHD 144Hz. Connected via TB3 to DisplayPort 1.4 Cable. Please see screenshots below.

Thanks for your work, it's kindly appreciated!

(I dont know how to do a pull request but wanted to submit this:)

Confirmed Gigabyte AORUS FI32U 4k @ 120hz, 144hz, or Variable Refresh Rate (48-144hz) on MacBook Pro 14" M1 Pro with USB-C or TB4 connection. KVM and HDR features work as well.

A2289:

• 2 Thunderbolt ports
• Coffee Lake CPU
• 9th gen iGPU with DP1.2

A2251

• 4 Thunderbolt ports
• Ice Lake CPU
• 11th gen iGPU with DP1.4 DSC

I have a A2251. It works fine with a 4k 144hz 10bit HDR monitor on bootcamp Windows 10 21H2. But it can only support 4k 120hz without HDR or 4k 75hz HDR on Monterey. I think there must be a bug in macOS that breaks the DSC.

https://twitter.com/sentreh/status/1402130563826208769

i saw LG UltraGear 27GN950-B can work on m1 mac mini on this repo's page, but what about M2.
coz i've seen so many people saying its not possible to have >60hz on a base m2 mac mini on reddit for example:
https://www.reddit.com/r/mac/comments/10swq0c/comment/jaunwii/?utm_source=share&utm_medium=web2x&context=3

Hi. I own 2017 13" MacBook Pro 4⚡ ports and LG 38GN950-B. I know that 120Hz won't work, however nice observation is that via Thunderbolt - DP cable it is possible to obtain 3840x1600 @ 75Hz, 30bit ARGB2101010 including HDR. DP 1.4 is negotiated.

What is surprising? DP1.4 instead of DP1.2. 75Hz vs 60Hz and HDR capabilities.

https://tonsky.me/blog/monitors-mac/

last line before "The List" -- >> comp_omised settings

Gigabyte M28U on macbook pro 14" 2021 works perfect. I haven't decided on buying a second one yet to try that out... ;)

Sorry if this is the wrong place to ask, but I'm interested to hear experiences of people with dual 4K @ 120hz screens.

Any luck so far?

https://twitter.com/keff85/status/1272932510511575040

tkafka/tonsky-me-mobile-tweak@429d1a1