com.flyingmeat.Acorn8.QLThumbnail
com.flyingmeat.Acorn8.QLThumbnail is the Acorn 8 Quick Look thumbnail container used by macOS to generate Finder previews for Acorn documents.
What is com.flyingmeat.Acorn8.QLThumbnail?
com.flyingmeat.Acorn8.QLThumbnail is a container folder for the Acorn 8 Quick Look thumbnail extension on macOS. It stores sandboxed data used when Finder and other Apple file browsers create thumbnail previews for Acorn-related files. You encounter this kind of item in ~/Library/Containers because macOS isolates extension data from the main app for privacy and stability. Acorn 8 itself is a macOS image editor that supports photo editing, vector work, export tools, automation, and other graphics workflows. This specific folder is not your image library or project folder; it supports preview generation for the app’s files inside the system file-browsing experience.
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Safety overview
Status: Mostly safe
This folder belongs to a sandboxed Quick Look thumbnail extension associated with Acorn 8. Its location inside ~/Library/Containers is consistent with normal macOS app-extension storage. Removing it does not uninstall Acorn 8, but it can clear extension data and may temporarily break or reset Finder thumbnail previews for Acorn files until macOS recreates the container. If you still use Acorn 8 or want normal previews in Finder, keep it.
Recommendation: Keep this folder if you use Acorn 8 and want Finder thumbnails to work normally. If you no longer use Acorn 8, you can remove this container as part of app cleanup; macOS may recreate it automatically if the extension is still installed and used again.
File path
~/Library/Containers/com.flyingmeat.Acorn8.QLThumbnail
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