DropBox recently added some new tricks that were… surprising. Ever see an app be able to do THIS in the Finder before?

Whats all this, then?
Yeah, me neither. interesting. but how did Apple allow this? Spoiler: they probably didn’t.
http://applehelpwriter.com/2016/07/28/revealing-dropboxs-dirty-little-security-hack/
And here’s some more info on how it was done, as well as a bunch of useful tips when you want to investigate anything on your mack with some command line tools:
http://applehelpwriter.com/2016/08/29/discovering-how-dropbox-hacks-your-mac/