FULL PRODUCT VERSION :
1.7 update 60

ADDITIONAL OS VERSION INFORMATION :
Mac OSX Mavericks

A DESCRIPTION OF THE PROBLEM :
The JVM argument XstartOnFirstThread is not working on OSX, for Web Start applications.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
The problem can be seen by launching any SWT application using Web Start, while keeping the argument "XstartOnFirstThread" in the JNLP file.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The application should have launched.
ACTUAL -
The application crashed during launch.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Error - "Invalid Thread Access".

REPRODUCIBILITY :
This bug can be reproduced always.