This has probably been done to death, but I"m still confused. :(
I have a DS-7604NI-K1/4P(B) now running on 4.30.000 and a DS-2CD2135FWDF-I running 5.6.5
Both are the latest firmwares.
I thought with these later firmwares, particularly level 4, they had sorted the problem with iMac and...