An installer for teTeX and ghostscript 6.01 can be downloaded
here (50 MB).
The installer let's you choose to install ghostscript only and does not require any Terminal input.
If you don't mind using the Terminal, you can also download the ghostscript package from
the same FTP-Server.
Note: ghostscript 7.00 and ghostscript 6.50 work on Mac OS X but might produce PDF that is not displayed correctly by Mac OS X 10.1, though it is displayed
correctly by Acrobat 4 and 5.
