Det skulle ikke være et problem med din Macbook, men det kræver at du har Snow Leopard installeret først. Læs her:
Mac OS X Lion will be available in July as an upgrade to Mac OS X version 10.6 Snow Leopard from the Mac App Store for $29.99 (US). Lion will be the easiest OS X upgrade and at about 4GB, it is the size of an HD movie from the iTunes Store. Mac OS X Lion Server requires Lion and will be available in July from the Mac App Store for $49.99 (US).
Lion requires an Intel-based Mac with a Core 2 Duo, i3, i5, i7 or Xeon processor and 2GB of RAM, runing the latest version of Snow Leopard. The Lion upgrade can be installed on all your authorized personal Macs.
The Mac OS X Lion Up-To-Date upgrade is available at no additional charge via the Mac App Store to all customers who purchased a qualifying new Mac system from Apple or an Apple Authorized Reseller on or after June 6, 2011. Users must request their Up-To-Date upgrade within 30 days of purchase of their Mac computer. Customers who purchase a qualifying Mac between June 6, 2011 and the date when Lion is available in the Mac App Store will have 30 days from Lion’s official release date to make a request.
Why only available from the App Store?
More information about Lion: