On OS X, is there a good application to open PS files without converting them to PDF?
In addition, I want to associate PS.GZ files to this application, but retain the TAR.GZ association to my uncompressor. Is this feasible?
There are several possibilities:
My personal recommendation: Use Preview.app!
Note that Preview cannot "open any PS file" -- it is limited to Postscript files that are structured in such a way that Preview can convert them to a PDF, and then it displays the PDF.
That means that hand-coded PostScript may not be compatible, but the output of any commercial application should be.