Previous 1 2 Next 16 Replies Latest reply: Aug 15, 2013 3:26 PM by mjc
Morgan Adams1 Level 1 Level 1

Just reporting this to see if something needs investigation:


Until now, my new Air 11" has been getting 5-7 hours battery life when I'm doing text editing and light browsing. Today the battery life dropped from 100% to 50% in 45 minutes!


The culprit was Lion's Finder, sitting at a steady 100% CPU usage--apprarently for an extended time. This is with only one window open (5 files), Show All Sizes turned off. No encryption active, no volumes mounted except the internal (no network volumnes, no external volumes, no disk images) No searches active, no Spotlight indexing, Time Machine off, Air Drop off. Only open apps: Safari, CyberDuck FTP, and TextWrangler (all 3 of which showing 0 to 1% CPU usage, as usual, and each with just one window/tab open). Nothing in Activity Monitor was doing much of anything, except the Finder itsel;f maxing out 1 of the 4 virtual cores.


Logging out and back in fixed the CPU usage (or I could have just force-relaunched Finder). So I wanted to log that tip in case it helps anyone. But I'll also be keeping a closer eye on Activity Monitor in future. Hope this is a rare fluke--overall, I'm a Lion fan, but it has its early quirks!

MacBook Air, Mac OS X (10.7), 4GB i7
  • JezChatfield Level 1 Level 1

    I've been using Lion for about two weeks and I've suddenly had the same sort of thing. MBPro, more than 100% of CPU being given to "Finder". Tried killing/relaunching Finder, but the CPU gets busy again.


    Closing the lid doesn't turn off the fan - the machine does not sleep, and on re-opening, Finder is busy again at 75-110% of CPU. I notice that mds is also running, but usually only at about 30% to 50% CPU.


    The most recent significant change? I finally got around to installing XCode 4.1 on this machine today.

  • Andreas Yankopolus Level 2 Level 2

    The same thing happens on my MBP running 10.7.1. I'm having to force quit Finder once or twice a day because it's gobbling 100% of the CPU.



  • Morgan Adams1 Level 1 Level 1

    Seems to be rare, at least: 2 weeks later, I haven't seen it happen again.


    (I have seen Safari spike the CPU on certain sites, but that's normal I think--inefficient JavaScripts, video or Flash, probably. Close the browser window and CPU drops again.)

  • frenchgen Level 1 Level 1

    The same thing happens once or twice a day on my MBP 2011 running LION updated from LEOPARD. Finder problems seems to impact other opened apps like firefox which grabs 100% and over of the CPU.


    For me, killing and restart finder resolves the problem. I have XCode 4.1 too but the problem occured before the XCode installation.


    I think the problem did not occured under LEOPARD even if the short time experience for this OS X version.



  • w3lly Level 1 Level 1

    Same here running fresh installed MacOSX 10.7 on MBP2009.

  • KillerXYZ Level 1 Level 1

    You probably have a finder window open on "All items". Im my case if I close that window (or go to a "normal" folder) the usage drops to a normal level immediately.

  • kao Level 1 Level 1

    i'm having the same issue. mines very frequent. multiple times a day.



    i use ipulse so i notice pretty quick when it happens.



    once finder starts using 100% of the processor if i do happen to miss it (like when i'm sleeping) other apps will start to use 100% as well.



    normally 'relaunching finder' fixes the finder issue for x amount of time and quiting and relaunching the apps seems to fix them.



    i noticed when i launch handbreak for crunching video that if i let it sit open for around maybe 10 minutes finder will start to use 100% processor followed by handbreak. this has happened around maybe 4/4 times i've left handbreak open.



    i've been pretty lazy about this issue but it's starting to get annoying so i'm gonna start looking for fixes. anyone have any suggestions besides checking out the console log (which i'll be doing next time i notice finder kick up.)



    for the record i'm running a 2011 macbook pro 15" lion 10.7.1 and my finder issue was going on in 10.7 and persisted through 10.7.1 (obviously.)

  • jstewart30 Level 1 Level 1

    I'm seeing the same issue as well (in 10.7.2), but I can shed a little light on the cause, after some experimentation.  My default window has a lot of files in it (168 items, viewing by icon), but it's not calculating folder sizes or "showing item info" or anything fancy, and it's not viewing "all items".  Closing the one window, though, drops the Finder CPU usage to nothing.  Reopen a window, and it pops back up around 95%.  This is only when I have it set to "icon view"...if I view in a list, CPU usage drops to normal.


    Having a window open with fewer items (29, or even 95) yields a normal Finder CPU usage.  But opening a different folder with lots of items as well (195) causes the same issue.


    So it appears to be caused by:

         - Having a Finder window open, in Icon view only, with something like "more than 100 items in it"


    Close the window, change the view method, or switch to a different window with fewer items, and the problem instantly goes away.


    Perhaps it's time to report a bug to Apple...

  • klu Level 1 Level 1

    I have a MBP mid 2010 with 8GB RAM. No issue after the Lion upgrade. Bug a week ago Lion Finder started to consume more than 100% CPU making the fans run constantly. It also happens that other open applications, as PowerPoint, go with it up to more than 100% CPU usage. Very often, also Flash Player is going up as well.


    Force quitting Finder brings Finder back to normal CPU levels while the other applications remain at 100%. After some hours Finder starts again going up to 100%


    That is certainly a bug Apple needs to fix quickly.

  • kao Level 1 Level 1

    i figured my issue out. it probably isn't the same as everyone elses though.


    i always create a swap and downloads partition aside of my main partition then simlink the downloads partition to ~/


    anyway i had named the partition downloads and simlinked it as downloads instead of Downloads and finder was freaking out. changed it and i haven't had the problem since.


    hope this may help someone, in the off chance.

  • klu Level 1 Level 1

    Kao is probably right, it isn't the same for everybody.


    I just figured out my problem: it was Sugarsync. Sugarsync actually was heavily using Finders resources. With Sugarsync closed, all CPU usage went back to normal. What a relieve :-)

  • nlaporte Level 1 Level 1

    I'm having the exact same problem. For me it's the applications folder. Did you even end up submitting a bug report?

  • benbfly Level 1 Level 1

    Are you guys running SuperDuper?  I am getting the same symptoms. Additionally, on the left hand side of my Finder window under "Devices" the main hard drive text is flipping back and forth between "Machintosh HD" and "backupMacintosh1".  backupMacintosh1 is the name of my SuperDuper backup disk image!  Quitting SuperDuper doesn't seem to fix the problem, though.  My SuperDuper image is located on my iMac's second hard drive (Macintosh HD 2).


    Thanks - Ben.

  • icooper Level 1 Level 1

    Yeah! The same as you said! The problem with thumbnail view!


    Apple please solve this ******* problem Thanks!

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