Not off base whatsoever, at least with display mirroring. One profile handles both. I remember many years ago using the GMB “Beamer” to calibrate projectors for presentations. The projectors output improved but the laptop display looked awful because that profile was being used on that secondary display. I don’t believe it is any different today with respect to mirroring. Andrew Rodney http://www.digitaldog.net/
On Aug 11, 2024, at 5:40 PM, Graeme Gill via colorsync-users <colorsync-users@lists.apple.com> wrote:
I may be completely off base, but if a mirrored display is sharing the same frame buffer, then full color management can only be applied for one display target at a time. If they have different outputs then they can possibly have different calibration curves, but without detailed knowledge of the hardware and software or some judicious experimentation, that isn't certain either.