GNS3 VNC on a Mac: The recommendation is to use Chicken of the VNC. Fix issues connecting to the console of GNS3 devices when using VNC. Free software worth $200: https://goo.gl/613TUF
GNS3 Download: https://gns3.com/
GNS3 Support (Go here if you need help): https://gns3.com/community
