Trully version of mac os is 10.10.2 for now. When install hasp driver used the last one at site but I check if it updated. HP work on 2560*1600@60Hz and in logs tab it discovered properly. I cannot use now dvi because I haven't second converter from mini DP to dual dvi. I use datapath with 4k resolution, because I need 4 separate full HD output, and I have it with 50Hz, as I say earlier datapath can set for each output any refresh rate. (and for trying to test n541 with 5 output I need 5 miniDP - Dual Link DVI wires and usb power hub for this reason, otherwise it wouldn't work)