If your Mac is suddenly running sluggish and you launched Activity Monitor, you may notice a process named ‘mds’ cranking away at 30% and even up to 90% CPU utilization. If you see this, don’t worry, it’s not abnormal behavior and your Mac isn’t crashing, it’s just indexing it’s built in search engine. What is MDS in Mac OS?Why are the MDS and MDS_stores so active?
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.What is Activity Monitor on a Mac?
You can use Activity Monitor to locate the troublesome app or process and force it to quit. You can find out how much energy your Mac is using, and see which apps or processes are using the most energy.Where can I find the activity monitor user guide?
To explore the Activity Monitor User Guide, click Table of Contents at the top of the page, or enter a word or phrase in the search field. Helpful? Please don’t include any personal information in your comment.