A few days after updating the entire iWork suite and removing it from the beta phase on iCloud.com, Apple today added a new web app for you: o Search My Friends (Find My Friends).
Just like Find My Friends for iOS (which is now built into the system), the web app is very simple. On the left, you have a column with the list of your registered friends; on the right, you can see all located on the map.
On Mac, Find My Friends is only available as a widget for the OS X El Capitan Notification Center.
Another good news that was really missing there.