Apple / Magic Mouse?
Читаем страницу Magic mouse на apple.com

System Requirements

 — Mac computer with Bluetooth wireless technology
 — Mac OS X v10.5.8 or later with Wireless Mouse Software Update 1.0* or Mac OS X v10.6.1 or later with Wireless Mouse Software Update 1.0
 — Existing keyboard and mouse for setup
 — Two AA batteries (included)

* Momentum scrolling supported only on Mac OS X v10.6 Snow Leopard.
у меня и на леопарде та же проблема(