Running an Eclipse RCP on Mac OS X Snow Leopard

Since I have updated to Snow Leopard lately I ran into the JVM 64 bit problem. SWT is simply not available for Mac OS X with 64 bit. This hit me when launching JCrypTool the first time after updating. The solution to fix this is to add -d32 as a VM argument for in the run menu entry and voilà, the RCP is running again.