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Sometimes the Dock will keep an icon app in the Dock, even though I haven't set it as such, even though I've previously de-kept it in Dock after the first time it kept it 'for me'.

Is there a way to turn this off it's a bit annoying?

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Are the affected apps random or consistent? Meaning are they the same apps or does it happen to nearly all the apps. – Randy6T9 Jul 16 '11 at 20:22
up vote 8 down vote accepted

Usually apps don't place themselves in the dock without your consent or knowledge. There are a couple ways to put them there though. Perhaps you may not realize it, but it may be one of these reasons:

  1. The App Store will place an app in the Dock upon installation. Note: Lion will not do this though; it simply places it in Launchpad.
  2. The App Store will place an app in the Dock upon updating an app. Note: Updating an non-docked app individually via the updates tab is when it gets re-placed in the dock. However using the 'Update All' button at the top of the page will not do any such thing. Again, this is changed in Lion.
  3. If you run an app that is not kept in the dock and drag it to another position anywhere on the dock, it will stay in the dock
  4. Drag an app into the dock from Finder
  5. Right click an app in the dock an under options select 'Keep in Dock'
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+1 - HandyRandy is all over this one - excellent! – bmike Jul 16 '11 at 22:56
Also, if the dock icon goes away after quitting the app but comes back after a fresh login, then the “Open at Login” option (also ‘in’ the dock icon with “Keep in Dock”) could be the problem. One more: a locked (or read only?) ~/Library/Preferences/ can cause Dock settings to revert at each login (see AD 17223). – Chris Johnsen Jul 20 '11 at 4:07
@Chris those are great suggestions. I think they deserve to be presented as an alternate answer. – Randy6T9 Jul 20 '11 at 5:39
It very well might be the moving of icon around the dock, never connected those to actions together. Thx! – Vukašin Jul 20 '11 at 13:27
Quite often I mis-time my click, do it while the cursor is still moving, and end up dragging the icon for a fraction of a second. Result: icon kept in dock, even though I've not asked for that and haven't even rearranged the icons. (I only figured this out today, but I must have been doing it for years without realising this was the cause of the odd icon mysteriously sticking to the dock. Perhaps this hint will help somebody else.) – Tom Seddon May 9 '13 at 16:02

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