About MacBook, MacBook Pro Software Update 1.1
Every MacBook is faster and more powerful than ever with Intel Core 2 Duo processors. It delivers extraordinary performance in a portable package, designed for life on the go. Browse the music, photos, and videos on your Mac as easily as you browse music on your iPod — from anywhere in the room, whether living room, dorm, hotel, or office.

Learn more about the MacBook.

What’s New in this Version
This update addresses a responsiveness issue on MacBook and MacBook Pro notebook computers. Some MacBook and MacBook Pro systems may occasionally experience a temporary suspension of keyboard input which can last a minute or longer. The Mac OS X 10.5.1 update is required before installing the MacBook, MacBook Pro Software Update 1.1.