I gotta ask: why are you still running Snow Leopard?
And yes, I know, it has all the terrible ShellShock bugs and other stuff that will never be fixed, but I just need to run some OS X software time from time and I won't buy a new Mac because of that.
And when I tried to install Linux on that, Wi-fi didn't work properly, and there were some other issues I had with I think rebooting and maybe some other hardware stuff (I know, it sounds like a cliche, but it's true)