This is a single-user (one license) upgrade version of OSX Leopard 10.5, the latest OS operating system from Apple. This DVD will upgrade your machine from 10.4 to 10.5 This is not a stand alone version, so you must have 10.4 to upgrade from in order to use this DVD.
Minimum System Requirements
• Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor
• 512MB of physical RAM
• DVD drive for installation