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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how do you preview in Finder? do you mean the Quick Look ? – Ruskes Dec 24 '14 at 21:26
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I think if one works the other will. – markhunte Dec 24 '14 at 23:16
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1Have a look at this thread http://superuser.com/questions/230204/make-os-xs-quick-look-work-for-custom-file-extensions – markhunte Dec 24 '14 at 23:57
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1@Buscar웃 Yes, I meant Quick Look. I will modify the question. – Chang Dec 25 '14 at 15:40
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Looks like a duplicate of http://apple.stackexchange.com/questions/23561/is-there-a-quicklook-preview-for-plain-text-files-with-unknown-extensions – Terry N Jul 07 '15 at 02:35
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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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1still works fine for me in Catalina. Just follows the instructions to get around the security warnings – Chris Apr 03 '21 at 02:26
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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
ecjb
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It is now ``brew install --cask qlstephen``, but it doesn't seem to work anymore. – PatrickT Apr 22 '21 at 08:21