Output from delivered app on Mac OS X

Hi Lispworkers,
I print a few things at the beginning of the startup function in my  
delivered app. I use "format t", "format *terminal-io*" and "format  
*standard-output*" and in LWM 5.1 they all end up in system.log, but  
in LWM 6.0.1 they don't.
1. How can I write to the system.log in LWM 6.0.1?
2. Any suggestions on how to create a debug window used when starting  
the app with "-debug"? I use delivery level 5 by the way.
I am on Mac OS X 10.5.8.
Best regards,
Sven Emtell