@priort
I tried copying the Eizo ICC profile in DT, it makes no difference compared to selecting Adobe RGB.
I have only one display, I also tried using the preview window but the behavior is the same.
@jorismak I just tried The Gimp, it works bad exactly like Darktable. I also tried RawTherapee, in the color preferences it’s clearly reported that “only sRGB output is supported due to MacOS limitations”. Well, it appears that they share the same limitation, but at least RawTherapee warns you. By the way is clearly not a MacOS limitation since all the other apps works perfectly ok, I guess it’s a GTK limitation under MacOS.
I am not a novice. As I stated before, other commercial apps works perfectly ok. I tried Photoshop, Lightroom, PixInsight, CaptureOne.
As reported HERE, it’s a bug, unresolved since years.