Software Updates for MacBook Pro and iMac

MacBook Pro Software Update 1.2
This update improves graphics stability and is recommended for all 2.2/2.4GHz MacBook Pro Models.
http://www.apple.com/support/downloads/macbookprosoftwareupdate12.html

iMac Software Update 1.2 (Tiger)
This update provides important bug fixes and is recommended for 20-inch and 24-inch iMac models with 2.0, 2.4, or 2.8GHz processors.
http://www.apple.com/support/downloads/macbookprosoftwareupdate12.html

iMac Software Update 1.3 (Leopard)
This update provides important bug fixes and is recommended for 20-inch and 24-inch iMac models with 2.0, 2.4, or 2.8GHz processors.
http://www.apple.com/support/downloads/imacsoftwareupdate13leopard.html