Help choose a better upgrade for my MacBook5,2 I recently got a 2009 macbook 5,2 as a gift from my uncle. When I tried to install MAMP it says i need to upgrade my OS.
What will be best option for my mac.
I am very new to these mac things &amp; I like it so much.
Configuration:
Model Name: MacBook
Model Identifier:   MacBook5,2
Processor Name: Intel Core 2 Duo
Processor Speed:    2.13 GHz
Memory 2 GB
I am not sure is it enough to suggest an option, so please don't hesitate to contact me if you need more info.
I found this article in Apple Support forums.
But its not cleared my doubt.
Can anyone make a detailed answer for this?
like

how to get directly update to more newer OS?
how to get the    installation disk? can i get it free?
do i really need to purchase    one?
Will a used disk work with my etc?
Snow Leopard, Lion or Mountain Lion.  As da4 mentioned, you will need to find out the capabilities of your machine and look up the requirements of the operating systems I listed.