Some features of the mac os x Yosemite

Some features of the  mac os x Yosemite:

The email message attachments can be up to 5 GB.

We can also use the mouse or the trackpad to attach the signature and  comments .

Safari web browser can search the internet without any of search engines.

Notification center have the notifications for the news , remainders also and other can also be shown  in the widgets also.

If you use the Iphone or Ipad  you can continue your work with the computer also. By having the computer and ipad in the same room.

If you use the Iphone  you can answer with the computer also and you must have the I pad and the pc in the same room,