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?


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

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


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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