If something goes wrong with the GT (GenomeTraveler), if you start it by the following method besides the normal icon click method, it helps to investigate the cause.

For Mac OS X (boot from terminal)

1. Start the terminal.
2. Operate from the terminal command line.
3. Go to the directory where GT is installed
4. > cd Applications / gtraveler / bin
5. Enter the command to start GT.
6. > java - Xmx 1000 m - jar GtrLauncher.jar