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Every time I delete it from the desktop, I get the same file ".DS_store" created after some time. Is there a reason why this happens ? And can I permanently stop it from being created ?

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See the Wikipedia entry on .DS_Store which explains what the file does. In short, Finder writes one in each folder to track icon locations, sized and the last window position / sort / size so you see a folder the way it was next time you open it. Desktop is always visible, hence the constant recreation of this file by the Finder. –  Alex Oct 6 '12 at 14:02
    
Have you ruled out disk corruption by booting to the recovery HD and running a disk repair operation? I would also get a good backup before poking at it in any way in case it's a sign of pending disk subsystem failure. Not likely, but why risk it if you don't have regular backups. –  bmike Oct 6 '12 at 14:04
    
@Alex so theres no way to hide that particular file type ?? –  Render Oct 6 '12 at 15:37
    
@bmike my laptop is about 2 months old, I really hope its not a pending disk subsystem failure already !!! –  Render Oct 6 '12 at 15:37
    
@Fendi, see this Superuser question as well. –  Alex Oct 6 '12 at 15:40

5 Answers 5

up vote 10 down vote accepted

Type this in Terminal (/Applications/Utilities/Terminal.app):

defaults write com.apple.finder AppleShowAllFiles FALSE
killall Finder

The first command sets the hidden files visibility to hidden; the second one forces Finder to restart. This is needed for the first command to take effect.

You can also log out/reboot instead of killing the Finder, but the first command is needed to change a hidden preference (one that the Finder can’t change using the normal Finder view options or preferences).

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Would like an explanation please –  Render Oct 6 '12 at 13:37
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The answerer is guessing that your finder somehow was set to show hidden files. It is the most logical explanation for why a file that normally is hidden by Finder would show, but you would also expect to see .DS_Store files everywhere if this were the case. –  bmike Oct 6 '12 at 14:02
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@Fendi The first command sets the hidden files visibility to hidden; the second one forces Finder to restart, action that is needed in order to make it take in consideration the previous command. –  Alex Oct 6 '12 at 14:07
    
Guess the only way to do it is to hide the hidden files or live with it .. –  Render Oct 6 '12 at 15:42
    
Just to keep this thread up to date, it's no longer necessary to kill the Finder to show/hide dot files. I'll post a new answer with a simple Applescript. –  Tetsujin Jan 11 at 10:39

.DS_Store is used by OS X to store directory information used by Finder such as icon position, etc.

In OS X any file name that starts with a "." is hidden, so to hide the .DS_Store file you can use the terminal command:

sudo defaults write com.apple.finder AppleShowAllFiles NO

Basically, you can ignore it. If you are copying a directory to a flash drive and looking at it in Windows, feel free to just delete it. It is Mac OS X Finder that creates this file whenever it opens a new directory.

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+1 for the explanation. –  CutRateGamer Nov 24 '14 at 14:11

There's a way to hide all "dot" files from Desktop with 3rd party app called XtraFinder.

Go to Settings → Features tab → Hide dot files on Desktop

Screenshot of XtraFinder

Though I still didn't manage to hide all .DS_Store files and keep all other dot files visible, this is a pleasant improvement.

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Just to keep this thread up to date, it's no longer necessary to kill the Finder to show/hide dot files.

This Applescript will do it by refreshing all window contents instead; it's also faster than relaunching the Finder.

set newHiddenVisiblesState to "YES"
try
    set oldHiddenVisiblesState to do shell script "defaults read com.apple.finder AppleShowAllFiles"
    if oldHiddenVisiblesState is in {"1", "YES"} then
        set newHiddenVisiblesState to "NO"
    end if
end try
do shell script "defaults write com.apple.finder AppleShowAllFiles " & newHiddenVisiblesState


tell application "Finder"
    set theWindows to every Finder window
    repeat with i from 1 to number of items in theWindows
        set this_item to item i of theWindows
        set theView to current view of this_item
        if theView is list view then
            set current view of this_item to icon view
        else
            set current view of this_item to list view

        end if
        set current view of this_item to theView
    end repeat
end tell

Save as an app & launch to toggle visibility.

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Apparently, it was due to an old Safari update that accidentally showed the .DS_Store file.

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