Postscript file by Mathematica, help!

I couldn't print the Poscript file by Mathematica.

Someone told me to use "psfix" to "fix" it, but I do not know where

to find this "psfix" file.

The postscript file is generated by the following Mathematica function call:

Display["File.ps",MyObject]

By the way, I am using NeXT machine.

Thanks.