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name Punditsdkoslkdosdkoskdo

mds & mds_stores constantly consuming cpu

mds and mds_stores are constant CPU consumers even when I think nothing should have changed on the hard drive.

Activity Monitor:

activity monitor

I have a circa 2009 Macbook Pro. Lots of software installed over the years. Dropbox and Crashplan are active background process among many others.

I have included many locations in the privacy settings of Spotlight.

  • USB drive
  • Crashplan folder
  • /Library/Caches
  • /Users/me/Library/Caches

Still, mds and mds_stores are constant consumers of CPU hovering around 10-12% each. My fan keeps running due to the heat.

Any ideas as to what it could be due and how I can troubleshoot?


I had this same issue. I went into Security & Privacy System Preference, just to look at what Spotlight was including. I checked one thing off and then back on again and it immediately stopped. Mine was using almost 100% CPU power and my fans were running nonstop. It all stopped after I did this and I have no idea why. I have a Mid 2012 MacBook Pro.

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I got the same issue, almost bought me a new mac. I checked all the stuff on the net about mds_stores etc... All I got was terminal programming and clean installation solutions.. without guarantees of fixing the problem.

So I checked my free-to-download cleaning and maintenance tool "Onyx" and in the navigation bar under maintenance you can check "Spotlight Rebuild" (as default is unchecked).

After that I had no problems and speed was up to normal. Also, Activity Monitor stays within normal parameters. I hope it stays that way and works. For it is an easy and free tip for non-technical Mac users.

Found that out an hour ago but looks promising. Goodluck

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As you know, the mds and mds_stores are Spotlight activities.

The reason why your Spotlight is so active could be a number of things; it could be you have an app or multiple apps constantly changing some folder contents.

First let's check whether Spotlight is the cause of the fans running so much. To test this, run the following in your terminal:

sudo mdutil -a -i off

this turns off indexing of files, and should result in a clear slow down of the fans if mds and/or mds_stores are to blame.

To turn indexing back on, run

sudo mdutil -a -i on

After this you could run the complete re-indexing of your hard drive (be aware this could be an over night job), it will delete your Spotlight data base forcing it to start over.

sudo rm -rf /.Spotlight-V100/*

The next and final step would be to add others to your (do not scan), privacy settings.

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