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I was trying to install the eclipse plug-in for an assignment. But the problem is, my installed eclipse's version is mars, which means I can not find the location of the 'plugins' directory, which was used to save plug-in jar files.

I've updated the eclipse Luna to Mars recently. When I installed(unzipped) the eclipse luna, I remember that there was 'plugins' directory and other things (including eclipse.app) were in the 'eclipse' directory. However, The mars, archive file just gives me an eclipse.app!..

Could you tell me how to add the plugin(*.jar, in my case, UMLet) to eclipse mars on Mac OSX? I have to do my assignment.. The due is coming..

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5 Answers 5

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In my case (Mars on Mac version Darwin 14.5.0, installed with Eclipse installer) I found the plugins folder in MY_HOME_DIRECTORY/.p2/pool/plugins . I found this path with this: Eclipse -> About Eclipse -> Installation Details -> Configuration -> property --launcher.library

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Thanks for this. The plugins directory is certainly is a strange place when the Eclipse installer is used...
Thank you, this should be marked as the correct answer. Using @greg-449's method probably works as well - until you upgrade your version of Eclipse and replace the .app file.
In newer Mac OS with code signing, @greg-449's approach will fail with a corrupted application error.
For macOS Sierra, the plugin path is different from @Babu's response. I found mine by searching for "*** Current Install Configuration:" in the dialog he mentioned.
same place for me for neon on linux
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Eclipse Mars on the Mac has been reworked to be a proper Mac application with everything included in the Eclipse.app package.

The new path for the plugins is

/Applications/Eclipse.app/Contents/Eclipse/plugins

If you are looking at '/Applications' using the Mac Finder you will just see 'Eclipse'. You have to right click on 'Eclipse' and choose 'Show Package Contents' to see the contents.

Just putting things in the Eclipse plugins directory may not work. If at all possible you should use a proper Eclipse update site (sometimes called a repository) with 'Install New Software'.

Note most Eclipse installs now use 'oomph' which installs in a different location - see this answer

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Thank u sir! I Finally find the path! It is kinda shocking, because i spent huge amount of time to find the path, but it is literally 'in' the app. Anyway thanks again greg-449! All hail Greg!
@WarrenP There are still 'package' installs of Eclipse available which do install where I said - I am running such a version. The Eclipse downloads which use the oomph installer do install in the user's home directory.
Thanks. It's confusing that there are two installer types. The oomph installer is the one most users get funnelled to and it puts plugins in ~/.p2
Please consider switching the accepted answer as this doesn't seem to apply when applications are signed or new ones are installed. The other answer addresses these concerns.
@MarqueIV The OP was last on Stack Overflow in Dec 2015 so this is unlikely to happen.
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you can use terminal add go to folder contain eclipse with has an icon, and use ls -lrt and you will see Eclipse.app in it. and cd to such folder and will see all things like windows.

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<Eclipse-path>/Eclipse.app/Contents/Eclipse

You can check in below location from your terminal, 

cd /Users/<user-name>/Downloads/Eclipse.app/Contents/Eclipse

where <user-name> is logged in mac user, <Eclipse-path> is a location where Eclipse.app is saved

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Don't think this is correct as the app is still in your downloads folder.
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https://i.sstatic.net/Crf53.jpg

You can find the installation folder in About Eclipse > Installation Details > Configurations.

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