Resolved Finder 100% CPU

Rossagues

macrumors regular
Original poster
Aug 12, 2012
120
0
UK
My MacBook Pro has been getting very hot recently for no reason.

When I open up finder it goes to close to 99% CPU just by using it and doing nothing within Finder. This is mainly the case when I open files with a lot inside of them. But this should not happen right?



Just this alone is making my CPU nearly 100 Degrees alone:



My MacBook Pro is a late 2009 model with a 2.8 GHz Intel Core 2 Duo processor. And 8GB 1067 Mhz DDR3 memory.

Is this normal or not?

Thanks,

Ross
 
Last edited:

stridemat

Moderator
Staff member
Apr 2, 2008
11,179
592
UK
Does the finder icon (the magnifying glass) in the top left have a little dot in the centre? If so, Finder is indexing which is quite processor intensive. Let it run and it should calm down after its complete.
 

Rossagues

macrumors regular
Original poster
Aug 12, 2012
120
0
UK
Does the finder icon (the magnifying glass) in the top left have a little dot in the centre? If so, Finder is indexing which is quite processor intensive. Let it run and it should calm down after its complete.
No it didn't it just shot up to 101.4% on my Activity Monitor.
 

stridemat

Moderator
Staff member
Apr 2, 2008
11,179
592
UK
Thats seemed to have calmed it down. Thanks. This Mac is so weird sometimes!

May i ask, what is the average temperate degree a CPU should be?
It depends on the type of processor and the machine it's in. Each type of mac will have different thresholds.
 
L

lukemcurley

Guest
I am having the same issue with Mountain Lion at random times. Just from browsing files within folders and using Icon view. CPU will spike at 70-100% just for the Finder process. When I close the folder, CPU usage drops back down again.

Restarting Finder normally fixes it, but it happens again at random. Very odd behaviour from ML. Causes my MacBook Air to get hot and fan start-up.

2010 MacBook Air - 1.8 GHz Core 2 Duo with 4GB RAM.
 

Rossagues

macrumors regular
Original poster
Aug 12, 2012
120
0
UK
Mine is always generally in the 50-70 degree area. Its never not hot. Thats with a 2.8 GHz Intel Core 2 Duo processor in it!
 

GGJstudios

macrumors Westmere
May 16, 2008
44,419
756
I am having the same issue with Mountain Lion at random times. Just from browsing files within folders and using Icon view. CPU will spike at 70-100% just for the Finder process. When I close the folder, CPU usage drops back down again.

Restarting Finder normally fixes it, but it happens again at random. Very odd behaviour from ML. Causes my MacBook Air to get hot and fan start-up.
Try browsing in list view, instead of icon view, which is more graphics-intensive. See if you still get the spike in usage.
 

M248

macrumors newbie
Aug 29, 2012
1
0
I had the same problem. In my case, it was caused by Dropbox.
I solved it by pausing syncing. Please try it.
 

rbarkman

macrumors newbie
Dec 9, 2003
3
0
London
And same problem here, traced to Virgin Media's "Backup & Storage" cloud-based-backup app (which is a skinned F-Secure client).

My guess is either:
  • these apps, which monitor file systems events to determine when to copy files elsewhere, are not using the right calls to the Mountain Lion Finder; or
  • there's a bug in the Mountain Lion Finder that causes it to churn when asked to report events

It's a pain, because I do like the automatic off-site backup the app provides. But Virgin hasn't updated the thing since 2011, so it's probably out-of-line with 10.8. Dunno if the Dropbox app is in the same position.