🚀 go-pugleaf

Does anyone know of a piece of software that would notify me of syntax
errors etc. in PostScript files before sending them to the Laserwriter?
I am aware that various desk accessories (e.g. Allotype's Laser Status)
tell you in a somewhat terse fashion what has gone wrong after you've
sent something to the printer - I need something more along the lines
of the debugger in MacPascal.  I deal with a lot of large text files
downloaded from a mainframe onto a Mac II and sent (in the form of
PostScript code) to the Laserwriter.
(By the way - I posted a similar query on comp.lang.postscript and
neglected to mention that it was software for the Mac I was specifically
interested in.  Sorry for the duplication - I'm just getting the hang of
this network thing.)