This is one for the search engines. If you’re running Mac OS X ~v10.8 (or later), you’ve probably got a folder at the path /Users/Shared/adi. Like me, you might be wondering what it is. I did some googling and got nothing. I dug a little further and found (part of) the answer: It is used by the Mac App Store and the new iBooks app. In case you’re interested, here are the steps I took to arrive at