On Mac OS X:
+ # On port based installs
sudo python setup-release.py py2app
+ # On brew installs
+ ARCHFLAGS="-arch i386 -arch x86_64" sudo /usr/bin/python setup-release.py py2app --includes sip
+
sudo hdiutil create -fs HFS+ -volname "Electrum" -srcfolder dist/Electrum.app dist/electrum-v0.61-macosx.dmg