Mac OS X 10.5 Leopard installation system requirements

Mac OS X 10.5 Leopard installation system requirements

Requirments for Mac OS X 10.5

Mac OS X 10.5 requires:

  • A Mac computer with an Intel, PowerPC G5, or Power PC G4 (867 MHz or faster) processor
  • 512 MB memory or more
  • A DVD drive for installation
  • 9 GB of available disk space or more
  • Some features require a compatible Internet service provider, fees may apply.
  • Some features require Apple's .Mac service; fees apply.


  1. Computers with processor upgrade cards are not supported with Mac OS X. Although Mac OS X may install and appear to work normally on some computers with third-party microprocessor upgrade cards, Apple does not provide technical support or assistance for Mac OS X when used in this way. Contact the manufacturer of your microprocessor upgrade card for support information.
  2. Check out the Mac OS X Leopard Technical Specs website for additional details on Leopard requirements (
  3. You should also read the Before You Install document included on your Mac OS X installation disc.