Safe to Delete

macOS Background Download Session Cache (com.apple.nsurlsessiond)

Space: 1 GB – 10 GB+ macos macOS
Quick Answer: nsurlsessiond caches incomplete background file downloads for system apps and iCloud daemon sync. Clearing the cache is safe.

Bottom Line: It is 100% safe to clear com.apple.nsurlsessiond. The macOS background download daemon caches partial network HTTP downloads in this directory.

What is nsurlsessiond?

Located at ~/Library/Caches/com.apple.nsurlsessiond/, Apple’s system daemon manages background web downloads for App Store and system sync tasks.

How to Clear nsurlsessiond Cache

rm -rf ~/Library/Caches/com.apple.nsurlsessiond/*

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