OSX box has remote management enabled (AppleVNCServer) and port 5900 open. Using tightvnc/ultravnc/realvnc can't connect because of "security protocol mismatch" (don't have the exact phrase). Googling yields only to posts that say "use OSXVnc" or other remote desktop solutions.
How do I connect to apple's default remote management using Linux / Windows?
Best Answer
be sure to activate the VNC password: go to
System Preferences/Sharing/Remote Management, press theComputer Settings...button, check theVNC Viewers may control...., and add a password there.