Yikes. This isn't working at all for me. I attach say a 3G mp4 to an email, and it locks up my iMac forever. I have to force quit out of mail. I haven't been successful sending any mail drop email., and when mail starts responding, the message just sits there in my draft folder, never sends. Trip to the discussion.apple.com might help.
10/17/14 at 11:34pm