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. Apr 17, 2015 at 18:37

2 Answers 2

  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.


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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