I need some advice. I am new and non-techy so please could you help me on a simplified level.
I am running Snow Leopard on my Mac which I am happy with. I will upgrade to Mountain Lion later but I want to bypass Lion.
However I need access to Xcode 4.2 for a course I enrolled on. It's a long story but you can't get access to Xcode 4.2 for Snow Leopard unless you have a paid developers account for $99. The only other option is to download Lion for $29.99 instead and use Xcode 4.2 for Lion.
I was told I could keep Snow Leopard and use Lion on a partition. I have downloaded Lion and made a bootable USB drive.
I keep reading about booting from a USB drive. What does this mean in practise? Could I just run Xcode from the USB drive instead of having to make a partition on my Mac's HD? Would an 8 GB flash drive be enough to run Lion and Xcode? All I need to use in Lion is Xcode and maybe Safari.
Or should I just make a small partition for Lion? I feel uncomfortable making a partition for Lion as I read that Lion OS makes a second extra unrecoverable partition that uses up space.