Hi,
I konw it has already been explained that as long as you choose "no color menagement"in Print Tool, even if Mac OS applies an sRGB profile on a untagged profile image (like inkseparation from QTR folder), it should be fine. My concern is that when you try to print and the window opens, under Color Matching, Colorsync is selected (and can't be changed) instead of QTR. Doesn't it means that the sRGB embedded profile applied by Colorsync, will be actually active?
THX
Dario