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In Finder, I see a file with the ".rel" extension. I'd like top open it in TextMate. I don't see TextMate in the list of choices, and, in fact, can't find it anywhere in the list of applications when I try to choose the application to open it with.

How can I tell Finder to open the file in TextMate, either now or always (by default)? How can I open an arbitrary file (i.e. even one with a known extension) from Finder in TextMate?

TextMate v2.0-beta.6
OS X Yosemite 10.10.1

  • If You have TextMate in Dock -> You can drag the file to TextMate icon. – Mateusz Szlosek Apr 17 '15 at 18:37
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  1. Select the file in Finder.

  2. Press ⌘I to Get Info.

  3. Set None to Other… in the Open With section of the inspector:

  4. Enable All Applications, then find and choose TextMate.

  5. Select Change All… to change the association for all .rel files.

0

To open any kind of file with TextMate (or other Applications)

…just once:
drag&drop it on the application icon (in the Dock or in the Finder)

…by default:
change the default application by using either:
- the file info dialogue in the Finder (see grgarside's answer)
- or with the freeware RCDefault - my favorite! With this preference pane you can manage all kinds of default associations to applications on your Mac.

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