macOS process library
What is corespotlightd on Mac?
corespotlightd handles indexing for content that lives inside apps, such as notes and contacts, rather than plain files on disk. Apps hand it items to index, and it keeps a separate index for each app in ~/Library/Metadata/CoreSpotlight.
- Part of
- Core Spotlight, the macOS framework apps use to make their content searchable.
- Safe?
- Yes. It is part of macOS.
- Can I quit it?
- You can, but macOS starts it again when an app next needs indexing, so it rarely helps for long.
The short answer
corespotlightd gets busy when an app gives it a lot to index, often after an update or when an app syncs or imports a large amount of data. That usually finishes on its own. Rebuilding the regular Spotlight index won’t fix Core Spotlight problems, because the two keep separate indexes.
Normal use
What corespotlightd usually looks like.
Usually it sits idle with low CPU and modest memory, waking briefly when an app saves something new.
After a macOS upgrade, or when an app pulls a large library down from iCloud for the first time, it can run for a while. Activity that stops on its own isn’t a problem.
Why corespotlightd uses so much CPU or memory
- A large sync or import
Setting up a new Mac, or syncing a big notes, contacts, or mail collection, gives apps thousands of items to hand to Core Spotlight at once.
- An update to macOS or an app
After an update, apps may ask for their content to be indexed again.
- An app that keeps reindexing
A bug in an app can make it resubmit the same items over and over, which keeps corespotlightd busy long after there’s anything new to index.
How to calm corespotlightd down
Start at the top. Each step is more disruptive than the one before.
- Let it finish
Leave your Mac awake and on power for a while, especially after setup, an update, or a big sync.
- Find the app that triggered it
Think about what you just synced, imported, or updated. Quitting and reopening that app often settles a stuck indexing run.
- Update macOS and your apps
Go to System Settings → General → Software Update, and update third-party apps too. Indexing bugs are often fixed in updates.
- Restart
A restart clears a stuck corespotlightd along with the app that was feeding it.
Seeing it in Spare
Find what it’s reacting to.
corespotlightd works for other apps, so its spikes usually follow something an app just did. Spare groups each app with its helper processes, so you can see which apps were active at the same time and how much CPU and memory they were using.
Spare treats corespotlightd as a system task and never offers to stop it.
Common questions
About corespotlightd
Is corespotlightd a virus?
No. It is part of macOS and supports search inside apps.
Is corespotlightd the same as mds_stores?
No. mds_stores and mdworker index files on your disks. corespotlightd indexes content that apps hand to it, and keeps separate per-app indexes in your user Library folder.
Will rebuilding the Spotlight index fix corespotlightd?
Usually not. Rebuilding Spotlight’s disk index doesn’t touch Core Spotlight’s per-app indexes. Updating or reopening the app involved is more likely to help.
Can I disable corespotlightd?
There’s no supported way to turn it off, and search inside apps depends on it. It’s idle most of the time.
Related processes
Sources: The Eclectic Light Company: Spotlight and Core Spotlight are different, The Eclectic Light Company: Using and troubleshooting Spotlight in Sequoia. Reviewed October 6, 2026.
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