All-in-one Quick Look plugin
Glance provides Quick Look previews for files that macOS doesn't support out of the box.
This is a fork of the original Glance plugin. Unfortunately, the owner seems to have discarded the project a while ago, and the app is largely broken on newer macOS systems. The aim of this fork is to revive the project and maintain it for future updates. For now, we have added support for macOS Big Sur and fixed several internal bugs.
The installation is slightly complex as the package is not notarized. The steps are as follows:
.dmg
file from releases, open the file and drag Glance.app to Applications.brew install glance-chamburr
.xattr -rd com.apple.quarantine /Applications/Glance.app
Source code (with Chroma syntax highlighting): .cpp
, .js
, .json
, .py
, .swift
, .yml
and many more
Markdown (rendered using goldmark): .md
, .markdown
, .mdown
, .mkdn
, .mkd
, .Rmd
, .qmd
Archive: .tar
, .tar.gz
, .zip
Jupyter Notebook (rendered using nbtohtml): .ipynb
Tab-separated values (parsed using SwiftCSV): .tab
, .tsv
There are existing Quick Look apps for some of the supported file types. Why create another one?
Why isn't the app available on macOS 10.14 or older?
The app uses the new Quick Look API that was introduced in 10.15, so it unfortunately won't work with older versions of macOS.
Why are images in my Markdown files not loading?
Glance blocks remote assets. Furthermore, the app only has access to the file that's being previewed. Local image files referenced from Markdown are therefore not loaded.
Why isn't [file type] supported?
Feel free to open an issue or contribute! When opening an issue, please describe what kind of preview you'd expect for your file.
Please note that macOS doesn't allow the handling of some file types (e.g. .plist
, .ts
and .xml
).
You claim to support [file type], but previews aren't showing up.
Please note that Glance skips previews for large files to avoid slowing down your Mac.
It's possible that your file's extension or UTI isn't associated with Glance. You can easily verify this:
PreviewVCFactory.swift
.mdls -name kMDItemContentType /path/to/your/file
. Check whether the UTI is listed under QLSupportedContentTypes
in Info.plist
.Suggestions and contributions are always welcome! Please discuss larger changes (e.g. adding support for a new file type) via issue before submitting a pull request.
Xcode, Swift and Go need to be installed to build the app locally.
To add previews for a new file extension, please follow these steps:
Preview
protocol. See the other files in the directory for examples.PreviewVCFactory.swift
.mdls -name kMDItemContentType /path/to/your/file
. Add it to QLSupportedContentTypes
in Info.plist
.README.md
, SupportedFilesWC.xib
, the App Store description and Credits.rtf
(if you introduced a new library).This project is licensed under MIT License.