How can I get icloud on my computer?
Are you absolutely sure you have 10.8? Go to the Apple icon on the top left, click About This Mac, and post the version of OS X you see there.
You are right. I don't have version 10.8. I have version 10.6.8
Now-what should I do? Is it necessary to pay $19.99 to upgrade to version 10.8?
If you want iCloud, yes.
Check to see if your computer is compatible:
Computer Compatibility - Apple
If you want iCloud, you need to upgrade to 10.7 or 10.8.
Depending on how much hard drive space you have open, you also have the option of creating a new partition so you can retain Snow Leopard for any applications/games not compatible with Mountain Lion, which is what I have done on our two computers.
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