ICC profiles not sticking

Old Toad, how this will help when laptop lid is closed?

Thank you

You're right. I tried everything and it fails :/

sorry, i didn't find it helpful.

datacolor served me well for maybe decades, loading the calibrated icc profile at login and keep that active until a full shutdown.

as far as i can understand, the proposed solution is:

1. use a preset as a starting point
2. calibrate the display with an affordable colorimeter like the spyder (not $15.000)
3. grab the values from the spyder report and paste them in the fine-tune calibration for measured stuff
4. keep the luminosity like that forever, and it's way too bright
5. re-grab and re-paste values every month or week you want to check and re-calibrate the monitor (monitor changes with time, so you have to do it)

again, not optimal.

we should admit that colorsync is just not working as it did and as it should, loading a profile and use it, and keep using it even in the absurd scenario of a standby.

both the apple customer support and datacolor support are having troubles admitting that it's just not possible to use a calibrated profile like i did for 25 years. to me this is ridiculous.