![]() ![]() Just make sure you buy the full retail install disk (it should be a black CD or DVD depending). I won't recommend Leopard because:- I have no idea which Mac your are using and the hardware might not be compatible with the latest OS X version Leopard- Leopard seems to have a few kinks to iron out still and if you only run older software, they might not get on too great with Leopard: quite a few software apps had to be updated for compatibility issues.Try eBay or an Apple reseller for Panther or Tiger, I doubt very much the Apple Store is still selling those versions of OS X. To update your OS X 10.2.8 Jaguar install, you will either have to buy OS X 10.3.x Panther or OS X 10.4.x Tiger. to upgrade to OS X Mountain Lion Mac must be one of the following models:?iMac (Mid 2007 or newer)?MacBook (Late 2008 Aluminum, or Early 2009 or newer)?MacBook Pro (Mid/Late 2007 or newer)?MacBook Air (Late 2008 or newer)?Mac mini (Early 2009 or newer)?Mac Pro (Early 2008 or newer)?Xserve (Early 2009) Classic is not supported on Intel-based Macs or in Mac OS X v10.5 "Leopard", but users still requiring Classic applications on Intel Macs can use the SheepShaver emulator to run Mac OS 9 on top of Leopard. graphics acceleration, DVD writing), the operating system offers the same functionality on all supported hardware.PowerPC versions of Mac OS X prior to Leopard retain compatibility with older Mac OS applications by providing an emulation environment called Classic, which allows users to run Mac OS 9 as a process within Mac OS X, so that most older applications run as they would under the older operating system. Except for features requiring specific hardware (e.g. systems that can be made to run up to and including Mac OS X 10.2 Jaguar, all G3-based Macs which can run up to and including Tiger, and sub-867 MHz G4 Macs can run Leopard by removing the restriction from the installation DVD or entering a command in the Mac's Open Firmware interface to tell the Leopard Installer that it has a clock rate of 867 MHz or greater. Mac OS X 10.7 "Lion" was the first version of OS X to drop support for 32-bit Intel processors and run exclusively on 64-bit Intel CPUs. 10.6 "Snow Leopard" was the first version of OS X to drop support for PowerPC Macs. In 2007, 10.5 "Leopard" was the first to run on both PowerPC and Intel Macs with the use of Universal Binaries. In 2006, the first Intel Macs had a specialized version of 10.4 "Tiger". 4 GB is a more realistic minimum.OS X originally ran on PowerPC-based Macs. They will run in 2 GB but you may not like its performance. The specified 2 GB minimum is barely adequate for either Lion or ML. To determine which Mac you have, what kind of CPU it uses, and how much memory is installed: > About this Mac
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