Finder used to show a warning dialog when I tried to open many files at once. Something like "Opening 100 files simultaneously may slow down the system. Are you sure you want to do this?"

I disabled this dialog, and now I want it back. Unfortunately I can't remember what I did to get rid of it.

  • Did you enter something into terminal like: defaults write com.apple.finder (OpeningTooManyWarning) -bool False (Was true)? – Carl B Aug 8 '13 at 6:59
  • @CarlB I guess so, but I can't find out which one it was – user123444555621 Aug 8 '13 at 13:30

I believe this has something to do with the launchctl limit

First run;

launchctl limit

Check to see what your output is; it should look kind of like this;

    cpu         unlimited      unlimited      
    filesize    unlimited      unlimited      
    data        unlimited      unlimited      
    stack       8388608        67104768       
    core        0              unlimited      
    rss         unlimited      unlimited      
    memlock     unlimited      unlimited      
    maxproc     709            1064           
    maxfiles    256            unlimited 

If you notice your maxfiles is set >256 then;

sudo vi /etc/launchctl.conf

Edit the file accordingly, and soft maxfile vaule back to 256.

I've also attached a link to all the default commands in case this isn't a fix for your issue. https://github.com/mathiasbynens/dotfiles/blob/master/.osx

| improve this answer | |

To check limits on your system run:

launchctl limit

To change max number of open files run:

launchctl limit maxfiles X unlimited

where X is the maximum no: of files.

To change the setting permanently add to the file: '/etc/launchd.conf' following line:

limit maxfiles X unlimited

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.