Just wanted to say - started testing this today. So far so good.
When this gets a little more mature - I'll 100% be buying it.
I use a mac but have numerous windows machines, a few OSX, that I need to manage, and having OSX support is a requirement for me.
The viewer only crashed on me once, but I'm working to get this running with my own relay server for my windows boxes to give it a good test drive.
Hopefully, since it's been almost 6 months, another big update is coming.
Either way - I've had good luck so far. The viewer on the mac doesn't support the server yet, but that's ok.