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Is there a way to tell OS X to use the quicklook text viewer for files with specific extensions?

For example, I use emacs org-mode for tasks lists, etc. Usually I view (and edit) these in emacs, however sometimes I browse in Finder and want to know the contents of an org file.

Similarly, this would be helpful for .conf files.

I know that I could search for custom QuickLook plugins (or create one) but it'd be easier and good enough just to use the simple text viewer.

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I installed QLStephen, which did successfully allow me to QuickLook my .org files. But it caused other problems. – incandescentman Feb 25 at 23:06
up vote -1 down vote accepted

Based on the sample UTImportedTypeDeclarations from qlcolorcode, I use this entry:

    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.source-code</string>
        </array>
        <key>UTTypeDescription</key>
        <string>Org-mode Text</string>
        <key>UTTypeIdentifier</key>
        <string>org.emacs.org-mode</string>
        <key>UTTypeReferenceURL</key>
        <string>http://orgmode.org/</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>org</string>
            </array>
        </dict>
    </dict>

Don't forget to run 'sudo qlmanage -r' from the Terminal(or relogin) to pick up the changes.

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Worked, but I also had to touch /Applications/TextEdit.app – Doug Harris Dec 7 '10 at 14:48
    
Where am I supposed to put this code? – incandescentman Jul 31 '15 at 23:15

You should be able to apply these instructions to adding the extension to TextEdit (rather than TexShop) to get what you want.

Good luck!

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1  
Tried this, didn't take. – Doug Harris Mar 2 '10 at 14:21

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