There is no free upgrade.
Do you currently have the 10.5.8 Combo update loaded? (if not download and apply the Mac OS X 10.5.8 Combo Update )
Then, check that your machine is suitable for Snow Leopard. It needs to be a Mac computer with an Intel Core 2 Duo processor. Check by reading the specs.
Snow Leopard is a paid upgrade by DVD not a download. To buy the DVD, if you are from the USA go to … http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard.
In Europe or otherwise substitute your national code in place of /us above.
In UK go to Apple Store UK Mac OS X 10.6 Snow Leopard - Apple Store (UK)
Before you start upgrading, back up your files. If you are unsure how best to do this, the following link is hugely informative. Most commonly used backup methods: Apple Support Communities.
Once you have upgraded to Snow Leopard, if your upgrade took you to 10.6.3 you will need to download and apply the Combo updater. Mac OS X 10.6.8 Update Combo v1.1 and follow with software updates to pick up the most recent security and iTunes updates.
ALL MacBooks are suitable for Snow Leopard.
Depending upon the OP's need for Snow Leopard, if it is to further upgrade to Lion or Mt. Lion, Apple may provide the OP a free copy of Snow Leopard by calling 800-MY-APPLE and explaining the need to obtain Snow Leopard in order to purchase Lion or Mt. Lion.
Apple did provide a free copy of Snow Leopard to MobileMe subscribers who requested one, such as myself, as a conduit to upgrade to Lion for iCloud.
Good afternoon, AB,
Now we have Mavericks as a free upgrade which incorporates Lion and Mountain Lion, do you know if Apple is bothering with people who have borderline machines as far as upgrading is concerned. That's why I made my post Snow Leopard only;
IMO, lion has never really made the grade except as an introduction to the higher levels and I'd not recommend it myself. Thanks for your good wishes, by the way.
a brody wrote:
If you are going to mention 10.7 to someone upgrading from 10.5, that's where the tip becomes important. Someone upgrading to 10.6 is not going risk as much...
As the eraser said to the pencil: "I see your point!"
a brody wrote:
...(as long as they have an Intel Mac).
If they do not have an Intel Mac (and hence are PPC) they only risk failure in their attempt to upgrade to 10.6