I Books X Container
~/Library/Containers/com.apple.iBooksX stores sandboxed data for Apple Books on Mac, including local app data used for reading and library activity.
What is I Books X Container?
~/Library/Containers/com.apple.iBooksX is the sandbox container for Apple Books on macOS. Apple Books is Apple’s built-in reading and listening app for ebooks and audiobooks, and the container holds app-specific data the Books app uses on your Mac. This can include local documents, app state, downloaded content metadata, and other files needed to open your library, remember reading activity, and support normal app behavior. Users most often encounter this folder when reviewing storage usage or cleaning up Library folders. Because it belongs to a built-in Apple app, removing it can reset Books data on that Mac and may remove local offline content or force the app to rebuild its data.
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Safety overview
Status: Mostly safe
This folder is associated with Apple Books, a built-in Apple app on macOS. Its location and name match the app’s sandbox container purpose. Deleting container data for a system app is not dangerous in the malware sense, but it can erase local Books data on that Mac, remove offline downloads, reset app state, and require the app to recreate files the next time you open Books.
Recommendation: Keep this folder if you use Books or want to preserve your local reading data and downloaded titles on this Mac. If you no longer use Books and are troubleshooting storage or app-state problems, remove it only with the understanding that Books may lose local data and rebuild the container when opened again.
File path
~/Library/Containers/com.apple.iBooksX
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