Update (17 December 2014): When Apple first released iCloud Drive, this syncing service was not supported MacDropAny. We have now updated MacDropAny to add compatibility with iCloud Drive. You can now use MacDropAny to sync any folder on your Mac with iCloud Drive. Learn more at the MacDropAny page of our website.
To read the original text of this blog post, which contains the former work-around required to enable syncing with iCloud Drive, continue reading.