The 27-inch 2020 iMac offers good connectivity too, including two Thunderbolt 3 (USB-C) ports, four USB-A slots, an SDXC memory card slot, and a headphone jack. This beast of a computing device is powered by Intels 10th-Gen Intel Core i9 processor. -Now go to macOS preferences and in XDR screen presets choose to make a custom preset, P3 colorspace, sRGB gamma for whitepoint you have to customize it: Enter previously measured white xyY coordinates, enter desired whitepoint (usually D65 or D50) and luminance and beacuse the reasons explained in my 1st paragraph, macOS (or any other color management engine) can calculate (predict) which RGB combination of native calibration primaries gives you your desired whitepoint. Click Continue. Kirk McElhearn, //