If you turn it off, you will have to uninstall and reinstall the drivers/4k utility program again to do this trick. Try to set the canvas resolution to 3840x2160 and see if OBS will use the higher resolution for the capture device as well.

Finally, as shown in the attached image of the Camlink Pro Device Properties in my first post, its video is "3840x2160p" with a refresh rate of "30fps" This is why I believe it is something in OBS.I do think the Camlink Pro only supports 4k30 when using NV12, and that the issue was created by OBS defaulting to YUY2 or something which made the source 1080.

Once that's all good and you're getting the appropriate resolutions being read in the 'grabber' app, go to OBS and select your first input. I am seeing 1) 3840x2160 as the resolution in the OBS source properties, 2) 3840x2160 as the video resolution in the camlink device properties, and 3) I am definitely getting a 3840x2160 output everywhere other than OBS, but 4) the logs from OBS are showing the source as 1920x1080 (even though the properties menu shows 4k).You can make a test environment by creating a new profile and scene collection and perform any testing within these. Because i think macbook lower resolution because card send info about hdmi resolution and system set max resolution at 60fps. What I want is for only the top-left 1920x1080 pixels of the 4k source to take up the entire canvas. Using the software may require the use of a computer or other device that must meet minimum system requirements. We guarantee your satisfaction on every product we sell with a full refund — and you won’t even need a receipt.