Idle apps using significant CPU time. Is this normal? (Includes Acrobat Reader and Final Cut Library Manager

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Level 2

210 points

Idle apps using significant CPU time. Is this normal? (Includes Acrobat Reader and Final Cut Library Manager

Was just checking CPU use on Activity Monitor and noticed Acrobat Reader is using like 25% CPU. It was idle. It had two documents open. FCLM came up high CPU briefly (one cycle in Act. Mon.) I'm not very surprised about FCLM, as it might be doing some background stuff, but Acrobat Reader with 2 docs open and doing nothing I could see? (Why do I use Acrobat? Because preview adds random horizontal lines to at least one document and the screen goes blank when I hold down the PgUp or PgDn key.)

macOS 12.7

Acrobat Reader version in a screenshot.

TIA!

iMac 24″, macOS 12.6

Posted on Sep 25, 2023 9:24 AM

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Answer 1

betaneptune Author

Level 2

210 points

Sep 25, 2023 9:20 PM in response to MartinR

Well, I watched Activity Monitor for a while and Acrobat kept using about 25% for quite a while. FCLM only occasionally, but FCLM is probably scanning for new libraries, new disks, disk dismounts and the like. But Acrobat only had two documents open. Why was it being so active?

No, a few seconds later, and for probably a minute at least, before and after, Acrobat was bouncing in the neighborhood of 25%.

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Answer 2

MartinR

Level 7

23,704 points

Sep 25, 2023 7:02 PM in response to betaneptune

There is probably nothing abnormal here. If you watch Activity Monitor you will see that the CPU usage list changes every few seconds (on the interval that Activity Monitor reads system usage). A few seconds after you took the screen shot Acrobat could have been 2% CPU, even 0%.

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Idle apps using significant CPU time. Is this normal? (Includes Acrobat Reader and Final Cut Library Manager

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