How to turn on AirDrop on your Mac computer, and send files between your Mac and other Apple devices

Once you turn on AirDrop on your Mac, you can use Bluetooth to send and receive files from other Apple devices wirelessly.

How to convert an Apple Keynote presentation to a Microsoft PowerPoint file

When you convert Keynote files to PowerPoint, you can allow collaborators without Keynote to open presentations on non-Apple computers.