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When I have .txt files or .py files, I can Quick Look those files in Finder. I have .jl files that are codes written in the Julia Language. Of course they are text files. They will open in a text editor like Sublime Text. How can I Quick Look these .jl files in Finder?

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3 Answers 3

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There is glance, it does work for me.

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  • Thanks! it works!
    – Chang
    Commented Mar 2, 2023 at 4:10
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update

With the new macOS release in 2019, the macOS Catalina, this approach is banned.


Install QLStephen, a QuickLook plugin that enables viewing of text files with arbitrary filetypes.

To install, copy the *.qlgenerator file to ~/Library/QuickLook/.

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    still works fine for me in Catalina. Just follows the instructions to get around the security warnings
    – Chris
    Commented Apr 3, 2021 at 2:26
  • Still works with Ventura
    – gone
    Commented Aug 20, 2023 at 6:34
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Thank you @SebastianHallumClarke

I didn't find ~/Library/QuickLook/ but I went to the github page of QL Stephen and enter brew cask install qlstephen in the command line and it installed QL Stephen successfully

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  • It is now brew install --cask qlstephen, but it doesn't seem to work anymore.
    – PatrickT
    Commented Apr 22, 2021 at 8:21

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