Riecoin and OS X

The Riecoin website (http://riecoin.org) suggests that Mac binary works for OS X. Unfortunately it doesn't appear to work on either OS X 10.9 Mavericks or 10.10 Yosemite: if you double click the Riecoin-Qt.app in the disk image, OS X complains that it "may be damaged or incomplete." The trick is to cd into the Riecoin-Qt.app folder/Contents/MacOS folder and execute the Riecoin-Qt command line app from the terminal. Voilà!