As OS.4 also installed via disc, this should not exclude any computers unless your DVD drive is not functioning.
Some features require an Apple windows 7 drop clock screensaver ID; terms apply.
Macs that can be upgraded to Oountain Lion.
5GB of available disk space.Apple - Free Oountain Lion upgrade Program.If you don't have enough space, you'll need to delete files and programs from your drive in advance.Mac Pro (Early 2008 or newer).MacBook Pro (Mid/Late 2007 or newer).
The program will display all system installations and mark those that support an update with a green arrow.
DVD drive for installation.
After the update, you can download new drivers for the card - if the manufacturer supports its use.5 - and reattach.
Before upgrading check that you computer meets the minimum requirements: Lion System Requirements.
App Compatibility Table - RoaringApps - App compatibility and feature support for OS X iOS.MacBook (Late 2008 Aluminum, or Early 2009 or newer).If your Mac does not meet these new requirements, you will not be able to install OS.5.For a complete How-To introduction from Apple see Apple - Upgrade your Mac to Oountain Lion).You can purchase Lion by contacting Customer Service: Contacting Apple for support and service - this includes international calling numbers.Some features require a compatible Internet service provider; fees may apply.Warnings, if your Mac has a third-party video card, remove it before updating.5.On most computers, you will see only one item and the installer will automatically select.The.5 installation also requires 9GB of open space on the hard drive.