The INNOCN 27M2V has some limitations with macOS. You’re limited to fixed 30, 60Hz, or 120Hz signals over USB-C or 30Hz or 60Hz over HDMI. You can enable VRR after setting the refresh rate to 120Hz, but enabling VRR causes flicker. The flicker does calm down after a few minutes, and VRR works without issue at that point, but the VRR implementation is inconsistent and may not always work properly. Sending a fixed 4k resolution also results in image flicker, so you’d need to switch it to 1080p if that bothers you, but that also means you get worse text clarity. If you’re using a MacBook, windows return to their original position when waking the laptop up from sleep, and you can also close the lid and continue using it on the monitor.
You can enable HDR and local dimming is automatically turned on, but like with Windows, you need to enable HDR in the OSD for the best performance; otherwise it looks dim. However, HDR flickers a lot with 120Hz signals over USB-C, as you can see here, and there’s still some flicker in SDR, but it isn’t as aggressive. Luckily, the flicker isn’t there with 60Hz signals or over HDMI.
