Navigate to your Applications folder, open Utilities, and double click on Terminal.

You're totally reinforcing negative sterotypes about Mac users... :lol:

 

Edit; if you drag a copy of the file into your Home folder, you won't need to mess with changing directories; just enter the zip command I gave above, substituting the name of the archive...

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The Wisdom of bagginsbill:

"Oh - the manual says that? I have never read the manual - this must be why."
“I could buy better software, but then I'd have to be an artist and what's the point of that?"
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