What Hendrik says is absolutely true. All of the updates that the Windows version gets are in the Mac version too. Unless it's a feature that the Mac version doesn't have like TV.
However, I do agree that it would be really nice if there were nearly as many builds available for Mac as there are for Windows. Unless those builds just contain fixes and changes for TV (which Mac doesn't have).
I don't know JRiver's internal build process. But if it's not a lot of effort to issue a build for Mac, why not just do that each time a release for Windows goes out? Just a thought.
Thanks for your continuous development effort JRiver guys.
Brian.