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"Runaway user process" via EtreCheckPro

I ran EtreCheckPro - just checking:

Only "trouble" found was Runaway User Process DiskSpaceEfficiency (Apple source) using 93.52% of CPU and Memory & Energy use.


Huh? Is this really a problem for concern?

MacBook Pro

Posted on Apr 25, 2020 12:30 PM

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Question marked as Top-ranking reply

Posted on Apr 26, 2020 8:54 AM

You need to go to System Preferences > iCloud > iCloud Drive and choose iBooks app. If you're running Catalina then it is Books. Like I said it worked for some. Another solution I saw was to just launch iBooks (or Books) and let it run for a while.

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7 replies

Apr 25, 2020 1:17 PM in response to pwwwayne

Could be. Are you having a problem? Please read Writing an effective Apple Support Communities question. We are here to help. We are all users. We are not mind-readers nor clairvoyants. We only know what you write down and tell us. Be specific and thorough. Include your hardware information and installed version of macOS. Try to write clearly. Think about what you want to say before you write it down, then re-read it to see if it makes sense.


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Using Activity Monitor


     Use Activity Monitor on your Mac

     Runaway applications can shorten battery runtime, affect performance, and increase heat and fan activity.

Using Activity Monitor Part 1- CPU and Memory

Using Activity Monitor Part 2- Energy, Disk, and Network


Apr 26, 2020 9:53 AM in response to macjack

Yes, I am using Catalina Books.


To find iCloud in System Pref., I had to use Search to find it --> within my Apple ID --> iCloud Drive [Options].

Books was already checked, so I un-checked it.

Ran EtreCheck again and the Runaway Process was "cured".


Coincidentally, my CPU Performance improved ("Excellent" in both instances, just closer to Normal times after unchecking Books.)

"Runaway user process" via EtreCheckPro

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