Ich vermute, Du meinst „Instant Hotspot“
Das Feature setzt iOS 8.1 und OS 10.10 voraus.
http://www.apple.com/de/ios/whats-new/continuity
http://9to5mac.com/2014/10/26/yosemite-ios-8-how-to-set-up-and-use-instant-hotspot
http://www.apple.com/de/ios/whats-new/continuity
http://9to5mac.com/2014/10/26/yosemite-ios-8-how-to-set-up-and-use-instant-hotspot