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I have several files with names c.XXXX and fort.XXXX, where XXXX are arbitrary characters. I want these file types to open by default in Emacs or TextEdit. How to do it?

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  • By definition, a file extension is a suffix at the end of a file that identifies what type of file it is. Finder and LaunchServices uses the extension (the suffix) to map default applications, icons, quick looks, etc. to files of particular types. You can't just re-map this on a whim.
    – Allan
    Commented Aug 1, 2023 at 20:47
  • @Allan Thank you for your reply. I am using Auto-07p, a bifurcation software, that inputs and outputs these filename patterns.
    – akr
    Commented Aug 1, 2023 at 21:13
  • Related apple.stackexchange.com/questions/13557/…
    – nohillside
    Commented Aug 2, 2023 at 15:17

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