I tried out ESB 4.1 on my Macbook and wasn't able to reproduce the starting issue you saw. I did encounter the unable to remove /etc when using the 'uninstall-common-fuse-esb' app, so I used 'rm -rf install_dir' to delete my first installation. Then I did a fresh install to a new directory. I started the esb from the bin folder each time. Was there any data logged to the /data/log/servicemix.log file?
Macbook w/ OS X 10.5.6 (x86)
Java version 1.5.0_16
Edited by: jgoodyea on May 4, 2009 11:50 AM
Weird...It magically started to work after I tried to reinstall it again.