> $ which bunzip2 > /sw/bin/bunzip2 That is not native on OS X. The fact it is is /sw leads me to believe you installed it from Fink. I also have a version, installed via MacPorts Chris-Jones-Macbook-Pro ~ > which bunzip2 /opt/local/bin/bunzip2 '/opt/local' being the classic 'MacPorts' software installation area. Chris