Have Mac OS X Leopard (10.5.8) and would like download Mac OS X Lion

Welcome to the Apple Support Communities

First, check if your computer is supported > http://support.apple.com/kb/sp575 Buy Snow Leopard > http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard Then, make a backup, insert the DVD and upgrade. Finally, open  > Software Update and install the most recent version.

I recommend to upgrade to Mountain Lion. Open App Store and purchase Mountain Lion. Check if your programs are supported > http://www.roaringapps.com

The first step in Upgrading... is to Snow Leopard = OS X 10.6.x

It is Not available as a download... It is a Paid Upgrade.

Do this first...

Check that your Mac meets the System Requirements for Snow Leopard...

Snow Leopard Tech Specs

http://support.apple.com/kb/SP575

If so... Purchase a Snow Leopard Install Disc...

http://store.apple.com/us/product/MC573Z/A/mac-os-x-106-snow-leopard

Other countries...

http://support.apple.com/kb/HE57

After the Successful Install, run Software Update to get the latest updates for Snow Leopard.

Be sure to make a Backup of your Current System Before Upgrading...

A note, AnaMusic, I just found out that Snow Leopard IS again available as a Download in the Mac App Store. Apple's been playing around with their OS's availabilities again 😉

RM

HI RM...

The Link in my Post ' Purchase a Snow Leopard Install Disc... '

is to the Apple On-Line Store...

How long it remains available... only Apple knows...

😉