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I have a 16 gb flash drive that is formatted using my mac, made bootable, and an OSX installation image put on it. I'd like to keep that drive around so I can do it again in the future, but I don't want to keep this flash drive just laying around not being used. I'd like to create an image of the contents so I can repurpose the drive, but be able to restore it back to it at a later point ( make it bootable again too ).

How would one go about doing that?

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In Disk Utility, you can make an image from pretty much anything, and write it back to a drive at a later stage. – user3463 Aug 16 '12 at 17:44
  1. Open Disk utility.
  2. Click on any partition you want to make an image of.
  3. Click "New Image" button.

That's it.

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