Ganz einfach, dein Book is nich dabei!
aus:
http://support.apple.com/kb/HT3744
Products Affected
iMac (20-inch, Mid 2009), MacBook Pro (17-inch, Early 2009), MacBook (13-inch, Early 2009), MacBook (13-inch, Mid 2009), MacBook (13-inch, Aluminum, Late 2008), MacBook Pro (15-inch, Late 2008), iMac (24-inch, Early 2009), iMac (20-inch, Early 2009), Mac mini (Early 2009)
aus:
http://support.apple.com/kb/HT3744