Yosemite’s Mail will warn you if an attachment is likely to be too big. When you send one of these Mail Drop “attachments” to someone who is using an older version of the Mac OS, employs an ...

With Mail Drop, attachments are temporarily uploaded to iCloud where they'll stay for 30 days. If your recipients use Mail in OS X Yosemite, they will receive the attachment as they normally would.

Mail Drop is a program on your iPhone, Mac, and iPad that allows you to send large email attachments over iCloud, thus bypassing email size limits.; An individual message and its attachments can't ...