Screenshots will be available once we hit the beta phase. right now we have an alpha with still a couple of important challenges to work on.
Regarding a switch from PRO 6 to the MAC version, it might take some time too. The first release will be focused on MIDI controller compatibility with basic DJ functionalities, no vinyl control at that point.
When we release a DVS version we will propose an upgarde offer for MixVibes 6 users. The marketing spect and prcing are still TBD.
I'll do my best to keep the us community posted once I get some reliable information