Attaching files in email can be a real pain, thanks to file attachment size limits imposed by different email servers. A new feature in OS X Yosemite, Mail Drop makes it possible for you to include much larger file enclosures as email attachments than ever before. The way it works is relatively seamless: You attach a file like normal, but instead of including the file data with the email, your Mac uploads the file to iCloud instead. What's included with the email is a file locator. Any Mac or iOS 8 device on the receiving end "sees" the file as if it were attached; others will find the file locator, and clicking on it will get them the file. It's simple, seamless, easy to use, and yet another way Apple tries to make it easy for you to do your work, rather than worrying about how to get it done.