The steps that show how to set default values for your network printer currently need one more step in Lion or Mountain Lion, Apple's newer operating systems, or you will get an error when going to http://localhost:631/admin.
Locate the terminal application by clicking on launchpad.
In terminal mode type
cupsctl WebInterface=yes (You can copy this text and paste it into terminal)
then press return.
In the last step you will save the new settings. You may be asked to authenticate. If so use your Macintosh username and password not the SSIS username and password.