Hi Andreas, thank you very much for your message and your faith in Datacolor products.
We are sorry, the new 14“ & 16" MacBook Pro 2021 with the new Liquid Retina XDR Display can not be calibrated at all.
Apple has prevented the calibration of this new MacBook Pro. All calibration solutions you will find on the market are effect by this.
Apple released a statement (Oct. 27th) on the Fine tune calibration of the MacBook Pro 2021 with the new Liquid Retina XDR Display. This fine tune can be done using certain spectroradiometer that start at around 15000 USD / 12000 Euro.
https://support.apple.com/en-us/HT212851
If you have saved a profile, please delete the profile from this folder. Be sure to empty the contents of your trash after you move the profile to the trash: To find your profiles on a Mac OS, click on your Finder and the Go menu at the top of your screen. Once you have your Go menu open, press the Alt/Option key and the Library will appear. The Library is hidden by default in recent Mac OS versions. Click on Library -> ColorSync -> Profiles to find your profiles.
The calibration of external monitors is not effected.
Feel free and don't hesitate to contact us again if you have further questions.
Best regards,
John Walrath
Customer Service
Datacolor AG