Dear ColorSync specialists, This question raised many times, but i missed if answer was found. There was a lot of functions for ColorSync Management, like CMOpenProfile, CMGetProfileLocation, CMCloseProfile, CMSetProfileLocation. They was deprecated and then removed from the SDK. But no real replacement offered. In fact you can use it even with new MacOS versions by linking old SDK. But in MacOS 10.13 situation become dangerous. Function CMSetProfileByAVID not set VCGT anymore, but that was described as "This is the only ColorSync function that sets video card gamma." My question is - what is the replacement for the function CMSetProfileByAVID in MacOS 10.13. I need to apply profile with the vcgt. And not just for the time my application works as CGSetDisplayTransferByTable do. I need to make it same as like user selected this profile in options. I hope Apple developers read this list too. Any hints appreciated. Thank you. Best regards, Vitaly Bondar