If the ps2pdf doesn’t work, it is probably due to the change of X11 since Mac OS X Mount Lion.
MacTeX/TexLive installs two Ghostscript binaries in /usr/local/bin, gs-X11 with X11 support and gs-noX11 without X11 support. It sets gs to be a symbolic link to the appropriate binary depending on whether or not you installed X11.
The current Mac OS X seems not to link gs to any of the gs binaries. So the Tex editors (Texpad, texmaker, etc…) may not able to convert ps to pdf.
There are two solutions:
- Change the symbolic link by running Terminal in /Applications/Utilities and typing
cd /usr/local/bin sudo rm gs sudo ln -s /usr/local/bin/gs-noX11 gs
- Modify the command which calls gs in /usr/local/bin/ps2pdfwr