MacGIMP need ghostscript to open PostScript files. With MacGimp2.0.5 (.app version), Gimp is not able to find ghostscript (gs command). When you try to open a PostScript file, Gimp tells you:
Error starting ghostscript (Failed to execute child process "gs" (No such file or directory))To solve the problem:
GS_PROG=/usr/local/bin/gsAnother solution is to put in the same file the line:
PATH=/usr/local/bin
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040501080150218