I'm trying to install my app from the Mac App Store now that it's been published. I'm using the same machine as the one I developed the app one. For some reason, the App Store claims "A newer version of this app is already installed on this computer." I haven't touched the version number since I submitted it so this is strange.
I've removed all references of the app from Applications, Library/Preferences, Library/Application Support, Library/Caches, /var, and Trash. I've also cleaned the Product from within Xcode.
Any suggestions?
Thanks!
Go to ~/Library/Developer/Xcode/DerivedData/ and delete your app's build folder.