PostScript questions on Macs with either Preview or Macghostview 1)  The PC implementation of Ghostview has a "Safer" option, checked by default, that prevents file creation (so that running a .ps file can't hurt anything in the environment).  One must uncheck "Safer" to run PostScript files that create files or one gets an invalidfileaccess error.  

What is the equivalent of unchecking "Safer" in either or both of the OSX PostScript viewers mention in the title?

2)  If a PostScript program contains an error, where to Preview put (hide?!?!) the error message?
I just started using MacGhostView and I have hand-generated .ps files that run other .ps files using the run command. I get Error: /invalidfileaccess in --run-- in a message window. By default the SAFER option for ghostscript is usually enabled in all versions of GhostView, which this app is based on. It is a security precaution that prevents a script from reading/writing from/to a file. I tried adding the -dNOSAFER option, which is what you would use with ghostscript, to Preferences-&gt;gv parameters but it didn't work. Looking through all the menu items, I finally found Options-&gt;Show gv parameters which displayed the options for this app. The -dNOSAFER option is replaced by -nosafer in this app. I don't know why they would change any of the options from the original syntax but all of them are like this. I added this option to Preferences-&gt;gv parameters and now I can open all my files. I also added -media=LETTER and -resize (separated by spaces) so by default I get a letter-size canvas within a fit window.

I can't open my .ps files that violate the SAFER option in Preview because there is no way to change the options in the app. The ones that do not violate this option seem to be converted to pdf before being displayed. I much prefer MacGhostView.