Trying to play Portal 2, having OS issues

I bought Portal 2 and was ready to fire it up, then it said I need OS ver. 10.6.7 to run the game. So I go to the apple website, download it, and the .dmg says I need 10.6 to run the update. I have version 10.5.8.

I'm really out of the loop with Apple updates, and I'm not that computer smart. I can't find a place to update to OS 10.6 for free. I thought I had Snow Leapord? Do I really need to buy this OS update?

Sorry if this question is dumb, but I really have no idea. Thanks for your help.

Yes, Mac OS 10.5.x is called Leopard. For Portal 2 you need mac OS 10.6.x called Snow Leopard.
So your only option is to get Snow Leopard ($30) and install it, and then software update and let it update to the most recent version of Snow Leopard.
But before you buy Snow Leopard, make sure you have an Intel chip based computer as it will not work on anything else.

McYukon said:

Yes, Mac OS 10.5.x is called Leopard. For Portal 2 you need mac OS 10.6.x called Snow Leopard.
So your only option is to get Snow Leopard ($30) and install it, and then software update and let it update to the most recent version of Snow Leopard.
But before you buy Snow Leopard, make sure you have an Intel chip based computer as it will not work on anything else.

Click to expand...

Thats ALMOST correct .. There is actually a whole line of intel macs that cant run Snow Leopard.

You need to make sure that its an intel chip .. AND that its a Core 2 Duo .. If it is only a "Core Duo" it is a 32 bit chip and cant run snow.

1st generation intel macs were all 32 bit .. With the low end minis actually using core solos .. the single core variety ...