I got it to work by using the windows client and using it. So now I'm good in between updates. If someone could tell me why it worked I'd be interested to know.
Is it just me or is it that every time there is a big update I get a checksum error when the game is loading. It is loading interfaces and then; checksum error, wait 5 secs; checksum error, wait ten secs; game updated please reload game. Could anyone please help me get runescape running. I don't want to wait a week for the next update so it can work.