I'm the author of Virtual DJ Studio, and I just want to thank
Codeweavers and everyone behind wine/crossover for helping expand my
userbase. Now anyone can run my software regardless if they are
using Windows, Mac or Linux. It actually runs more smoothly on Linux
than Windows in my personal experience...
You are most welcome!
Assuming there's nothing additional that needs to be done, I created a CrossTie for Virtual DJ Studio 7.x:
https://www.codeweavers.com/bin/c4p/13771
And since I'm testing with El Capitan today (the new version of OSX), I tested it out there. All seems to run well with the forewarning that I am no expert with this software.
You should be able to link to our Compatibility Center to offer our solution or to the CrossTie.
Cheers!