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I used to have no issues with this, but all of a sudden sysmond is using 100% CPU while I have Activity Monitor set to the Memory tab. sysmond runs normally while in any other tab (CPU, Energy, Disk, Network). The problem only occurs on the Memory tab. Turning down the update interval does nothing. I've already restarted and had no other apps open except AM but nothing changes. It still uses 100% while I'm on the memory page. I am using macOS 10.14.6, on a MacBook Pro.

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  • Such incidents have increased. After softwaredownloadd, accountsd : sysmond. Could you check relevant questions on the site and report your findings?
    – anki
    Commented Nov 3, 2019 at 23:24
  • @ankii I'm not sure what you're asking. I've searched a ton before asking, and the only thing I found was related to normal sysmond usage (around 7%), which isn't what I'm seeing. I've updated my answer to include that sysmond only jumps to 100% while in the memory tab, and it behaves normally when in other AM tabs.
    – At0micMutex
    Commented Nov 4, 2019 at 0:01
  • Why are you on the memory page? What do you want help doing - explicitly asking a question at the end of your question will help us help you. I would use top in terminal and quit activity monitor. Is that a valid solution for you?
    – bmike ♦
    Commented Nov 4, 2019 at 1:51

2 Answers 2

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I've fixed it. I had shared memory and private memory both checked. Enabling either one seems to cause sysmond to spike in CPU usage, and having neither checked returns sysmond back to its usual state. Odd.

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My first triage step would be to make a totally new user account and isolate if you can reproduce this on a new account.

My guess is you have a system corruption or just some poorly behaving programs. Logging out of your current account after making a new admin user will let you know for sure which avenue to persue.

Without a little fault isolation and troubleshooting - people are going to just start guessing with their favorite “cure / quick fix” so I’d recommend one triage step and perhaps a follow on question once you know a clean user can spike the system and post all the processes you have in a screen shot on that new account.

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