Darktable not correctly displaying Display P3 color space?

[Matt_Maguire]

@CommunyAS

Could it be that darktable does not read the MacBooks color profile specs correctly?
Or has darktable is a problem with Apple’s color profile sRGB transfer function?

This is a well-known problem with the GTK+ implementation on Mac OSX, and has been discussed multiple times in this forum, for example:

Wide-gamut preview in macOS

@Morgan_Hardwood @houz @paperdigits @patdavid WARNING: long message ahead… Yesterday evening I have finally managed to bypass the OSX UI color management and to send pixel values directly to screen… below I will try to describe how I got there. Foreword 1: I am shocked by the Apple API documentation… I have looked into many Open Source libraries, made by volunteers during their limited spare time, and each single one I have checked had an API documentation that was 100 times better than Apple…

It’s one of the reasons I switched to using Linux for most of my photo editing.