I am trying increase free space in my IMac, is there any need for keeping the app installing mountain lion?

Removing "install Mountain Lion" from mac OSX 10.9.4.

If you're running 10.9.4 (Mavericks) and you have no need to revert to the earlier version of OS X (Mountain Lion) you can delete it. However, you may want to make a copy of it on to an external DVD or USB stick first 'just in case'. It may save you another 5gb+ download in the future if you ever did find you wanted to revert to Mountain Lion.

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    >
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