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On the Mac, a lot of programs hide the .zzz extension by default. Is there a way to turn this behaviour off so that extensions are never hidden by default?

I know I don't actually need it, I just prefer it to be there.

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up vote 38 down vote accepted

With Finder active, hit Cmd+, to go to preferences. In the advanced section, you will find the option to show file extensions.

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Sweet ... thanks heaps. – Bruce McLeod Sep 4 '09 at 4:17

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