Hi, I just got a Samsung QN90D 43", and while I could get 4k 144hz 4:4:4 on my M4 MB Pro on Sequoia, on my Mac Studio M2 Max on Sonoma I can't go above 60hz without 4:4:4 turning off automatically.
Using the latest macOS was described in the OP:I'm using a MacBook M1 Pro with an LG C2 42" and a MOSHOU VMM7100 cable. After I updated my Mac from 14.0 to 15.5 (for using Final Cut Pro), I found I can now get 4K 120Hz HDR 12-bit 4:4:4. I'm not using Better Display, and everything looks great – even better than before.
When I was on 14.0, I could only get 10-bit HDR. Also, I can now control the TV's brightness directly from the Mac, which was disabled before. I'm not sure why this happened. I haven't updated my adapter's firmware since I bought it in Feb 2024.
Unfortunately, I already agreed to sell my C2 to someone about a week ago so I won't be able to use it anymore. 😢
read the OP. U need latest Firmware from CM. And I think latest macOSHi, I just got a Samsung QN90D 43", and while I could get 4k 144hz 4:4:4 on my M4 MB Pro on Sequoia, on my Mac Studio M2 Max on Sonoma I can't go above 60hz without 4:4:4 turning off automatically.
I have an M4 Max in a Mac Studio running this same monitor, but I think the M4 Pro MBP has the same capabilities. You don’t have to run it as two monitors, you can get the full resolution (7680x2160) at 120Hz using a quality USB-C to DP 2.0 cable and software like BetterDisplay to allow more resolutions and refresh rates. Over HDMI, I was only able to get 7680x2160@60Hz.Hello just landed on this thread. I have a macbook pro M4 and I wanted to connect it to my neoG9 59 inches screen. The resolution and framerate is good but the scaling is either too big or too tiny. Can you help me please ? I tried different workaround with betterdisplay but i lost resolution in the better case. Is there a way to keep the best resolution and framerate ? (I am not very techfriendly so please detail the solution if you have one)
Thanks !!!!
All clear now. I downloaded it before the 9th of April, on the 8th actually, but now I'm over:
Firmware name: *BC_CM_MBP4k120
Firmware version: 7.02.116
Configuration file version: 0x040
Thanks for the heads up. VMMTool works just fine over parallels no need for the auto updater, but looks like it's worth to keep an eye on the firmware site.
My Mac says it cannot open it.Oh and BTW there is a macOS app to do firmware updates now, but it did not work for me (MacOS 15.5).