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I cannot figure out why this is so slow

iMac Retina 5k 27-2017

3.4 Quad core i5

40gb ram

Radeon Pro 570 4gb

 

This topic was modified 3 months ago 2 times by [email protected]
3 Answers
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@bmwmac-com
What kind of boot disk? Rotational disk, SSD, or Fusion?

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And if there is a rotational disk involved, it is 7200RPM or 5400RPM.

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Actually, if a rotational disk is involved that can be the issue.

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Current macOS (since El Capitan) has really needed an SSD as the boot disk to get any kind of good performance.

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Also rotational disks can age out, and start having silent retry errors that slow down disk read access.

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Apple 512gb SSD came with machine. All the apps are located on that drive as well.

@bmwmac-com
I would run Applications -> Utilities -> Activity Monitor to see if there is any high CPU, Disk I/O processes when you are opening those folders.
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You might also run EtreCheck (free version run is best)
https://etrecheck.com
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EtreCheck will show you all the 3rd party kernel extensions, 3rd party launnch agents and daemons, your Login Items, etc....
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If you have lots of that stuff runnning, it could be impacting your ability to access the disk quickly.
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Also 3rd party anti-virus can get in the way of everything.

This issue is still the same when I reboot holding down the shift.

@bmwmac-com
What happens if you unplug the 10,000 external disks you seem to have plugged in?

I see about 7 actually, but the Finder maybe probing each of those external disks. I have this vague memory that the Finder does something like this.

So unplug them and see what happens.

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Posted by: @bmwmac-com

So far so good, i'll follow up if the problem starts again... but been good for the last hour:
https://forums.macrumors.com/threads/help-iconservicesagent-is-using-60gb-of-ram-and-100-of-cpu.2073093/page-2?post=28456710#post-28456710

 

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