Find My Friends, a feature that’s been available on iOS devices for awhile, is now available on Mac OS X El Capitan. It brings the convenience of the iOS app to the Mac’s Notification Center.
The Notification Center widget lets you integrate with the Find Friends app from iOS. To make this happen, open the Notification Center, and choose"Edit" and "+" beside the "Find Friends" widget. This will show the widget inside of the Today section of Notification Center. Now you can pick an available friend to see a map of their current location.
OS X El Capitan is available as a free update from the Mac App Store. The operating system upgrade supports all Macs introduced in 2009 and later, and some models introduced in 2007 and 2008.