I established today a Mac-to-Vista connection from my livingroom Mac Mini, and rather than using the native Mac VNC implementation, or the open source version (Chicken of the VNC), I ended up using RealVNC for this (launch it in server, rather than service form in Vista, then install and use the Mac version of RealVNC viewer, available from: -bin/download.cgi?product=enterprise4/vncviewer/macosx ).