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How do I install this program so that I can do postscript printing?

Currently I get -bash: a2ps: command not found

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Well, first you'll want to install MacPorts on your Mac. This allows you to easily install new command-line applications.

Then, just use the following terminal command:

sudo port install a2ps
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+1 for useful info. However macports is older and has issues so I use homebrew and thus have given my answer as that. – Michael Durrant Jul 29 '12 at 14:35
Macports is constantly updated so older does not mean less up to date. It did start earlier – Mark Jul 31 '13 at 11:20
up vote 3 down vote accepted

I have homebrew so the solution for me was:

brew install a2ps
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