We have the same problem here with our Automatic Duck exports from FCP PRORES HQ to DNX185HD. There is a hefty gamma shift when exporting to a MAC based AVID.
Funny enough – it works fine when exporting to a PC AVID.
Looks like the old 1.6 vs. 2.2 problem.
A few more to name – Pogle, Baselight, Speedgrade, Final Touch – now Apple Color.
Ask 10 colourists – you’ll get your column sorted in 10 different orders…