If it says PowerPC you cannot upgrade to Snow Leopard and above. Then click 'More Info' to see which processor you have. If in doubt check this: Click the apple at the top left of your screen and select 'About this Mac'. ![]() OSs beyond OS X 10.5.8 require an Intel processor. Leopard works well at 500 MHz with 1 GB of RAM and many happy users have less than this. Details: Standard Leopard installers impose several hardware limitations including speed and RAM size but all these restrictions can be overcome. Those wishing to upgrade to Leopard should be aware that install disks can be expensive unless you contact Apple. The Apple History site has specifications for every Mac ever produced: Inexperienced users should follow Apple's install advice but experienced users may prefer to do a clean install. Hard disks can fail at any time so it is important to regularly backup to an external disk with Time Machine or a third party alternative. ![]() Ensure your data (at least all Home folders) is backed up before you install.
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