Stream of subconsciousness...

I’ve spent days reading post after post after post after post that purported to solve the mystery of how to hook up the magic pieces just right to enable files to be dropped onto your app’s icon.

However, since none of the links I trawled included both up-to-date and complete examples, I figured I’d put one together for whoever has to fight this battle in the future. Caveat emptor, but really, it’s as simple as hell, so you can’t go wrong.

DockDrop.zip, 19KB, version 1.0 - GitHub

If you’re interested, the nitty gritty magic bits that need be plumbed up just right:

• Make sure your delegate implements NSApplicationDelegate, and that it is set as the delegate of NSApp.
• Implement application:openFile: in said delegate.
• Ensure you have a proper CFBundleDocumentTypes entry in your app’s Info.plist (see the example’s plist).

Update: Farktronix replied with some interesting information about some serious Dock shenanigans that Google is using with the Chrome browser.