A software update is now available for Apple MacBook and MacBook Pro systems.

The update addressed an issue that caused the keyboard to freeze. Reports indicate that the Intel-based models running Mac OS X Leopard were affected, with keyboard freezes lasting for up to a minute, or more.

In its notes about the MacBook, MacBook Pro Software Update 1.1 Apple says: “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.”

The update is available here.