1 Answer

See>http://www.apple.com/ca/shop/product/MC573Z/A/mac-os-x-106-snow-leopard

Also>http://www.apple.com/ca/osx/how-to-upgrade/

And more importantly read here>http://jimmymacsupport.com/snow-leopard-support-dead-seems-time-upgrade-lock/

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What are my options?

Upgrade or replace. You can upgrade your software and/or computer. This is what I recommend because it means that your computer will be receiving the attention from Apple that keeps your computer safe. Any Mac since about 2007 is capable of running Lion 10.7 or later, though you may need to give your computer a simple and inexpensive RAM (memory) upgrade. PowerPC or 32-bit Intel Macs can’t be upgraded though, and may need to be retired or you may need to be extra careful.

Security Audit. If you simply must stay with Snow Leopard because you run a legacy program or because you can’t afford to replace your computer, you can do things such as disable unused services, turn on your firewall, and check your router settings. Not an optimal solution but sometimes you have little choice.

Alternative OS. Even if Apple isn’t supporting your computer anymore, other software can replace OS X. You may want to check out a Linux distribution such as Fedora or Ubuntu. These systems, though fairly easy to use, are often difficult to set up and require a bit more technical skill than many users are comfortable with. I won’t be covering this option any further here, but if this is something you can handle you’ll know where to begin. I only mention it because it’s a solution that people often overlook. Windows might not be an appealing alternative because BootCamp on the the Macs which are obsolete only supports Windows Vista, which will stop receiving security updates in 2017. Apple publishes a table of which Macs support which Windows systems.

Upgrade

Most Macs since 2007 can run at least OS X 10.7 Lion, though they may need an inexpensive RAM upgrade to be really usable. The minimum requirement is technically 2 GB, but I always recommend at least 4 GB if your computer can handle it. On Mavericks you will likely notice a further performance boost with 8 GB.

Can my Mac run 10.7 Lion? **UPDATE** It seems that now Lion is in the same boat with no more security updates. Any Mac with a 64-bit Intel processor can run Lion. To find your processor click the Apple menu and then click “About This Mac…”. Look for the processor section. It will likely say something about Intel. If it says “Core Duo” or “Core Solo” you can’t run Lion and you’re stuck with Snow Leopard. If it says “PowerPC” you are stuck with an even older version of Mac OS.  If it says anything else, including “Core 2 Duo” you can upgrade to at least 10.7 Lion. "