I Installed Logic Studio into my system and found that while i wanted all the components of Logic Studio, i didn’t want Qmaster to start when the machine boots. Changing files in /etc/hostconfig didn’t help. Ultimately, i discovered that theqmaster was controlled in the file

/Library/Application Support/Apple Qmaster/qmasterconfig

Simply edit that file and change the value of QMASTERDAEMON from -YES- to a -NO-.