Cable Matters48Gbps USB C to HDMI 2.1 Adapter, Supports 8K 60Hz / 4K 240Hz HDR, Thunderbolt 4 to HDMI2.1, HDMI 2.1 to USB C Adapter, Compatible with Thunderbolt 5 - Max Resolution on Mac is 4K@60Hz

If you have a M1/M2 mac and are looking to get HDMI 2.1, 4k/ 120hz, this is the converter you want! No need to flash it like the youtube videos, plug and play with the mac (buy the mac version)

Worked exactly as described with 5120x 1440 on the odyssey g9 ultra wide. Via the micro hdmi port to hdmi cable attached to this adapter

After what feels like years of searching, finally found an adaptor that enables 4K 120hz + HDR from my M1 Max MacBook Pro to my LG C1 48". What a game changer. Make sure to get the MacOS version if this is what you're looking for.

Just bought a Mac Studio and THEIR OWN HDMI does not support HDMI 2.1 consistently when connected directly to a Samsung QN90B. HDR would only be supported at 60hz or less, and restarts would randomly change the frame rate and dynamic range back to SDR. CableMatters' own USB-C to HDMI 2.1 cable also failed to support HDM! 2.1 well. However this adapter consistently keeps my Mac Studio connected to the TV in HDMI 2.1, with a consistent 2160p, 144hz, HDR configuration. Shame on Apple for sucking so bad at HDMI implementation, but CableMatters fixed it.

This has made such a difference on my M1 Pro 16 connected to an LG C2 42 OLED. The mouse and scrolling is so smooth at 120hz compared 60hz, and that difference is pronounced on such a large screen. The only issue I have is once in a while the signal to the TV is lost, so I just have unplug and plug it back in.

Use it to connect iPad to AV system. Works fine. No issues.

So I got this adapter in hopes of upgrading my 1660 Ti with a HDMI 2.1 port. Why? To run 4K @ 120Hz and Full RGB/ 444 for HDR purposes. I know, I'm stretching the bandwidth limits of the hardware. Technically the USB-C port which comes from the 1660 Ti cannot do the full 48 Gbps. A non-thunderbolt USB-C is speced to top out at 40 Gbps. I knew this before I bought the adapter.Yes, I got it to run the above. But I have now had the adapter for a couple of months and the image disconnects have just gotten worse. Now it is having difficulty even connecting at all. Perhaps something got cooked. It was getting rather warm. Not USB flash drive hot though.My biggest other complaint is that something is not translating with the audio channels. If I take the same HDMI cable and plug it into the 1660 Ti's HDMI port. I can get it to see my 4k/8k AVR at 24bit and even run Dolby Atmos no problem. But with this adapter and the mini displayport version of this adapter (which I also bought) I just cannot get the PC to run anything other than 16bit. Also, I cannot even get basic 5.1 to work properly anymore. It is intermittent and most of the time I end up getting the sub channel on the left rear and my center channel on the right rear. Sometimes it does work perfectly for a couple minutes though.And no, there isn't a mis-wired speaker, the home theater works fine with a Roku and PS3 attached. This is not an HDMI cable issue, as I am using a certified 8k cable.My conclusion is that if I want the above I need a new GPU or PS5, which is almost saying the same thing.This device will give you an additional video port at high resolution, but don't expect any multi channel sound to be reliably pulled through it or HDR.

bought this for our new Mac Mini M4 to connect the second monitor on my wife's work area. Running two new Dell 27" high res IPS monitors. Works great, image is great. I tend to generally like their products and am usually not disappointed.