Severe lag on new MacBook?

[GandalfGrey]

Hey all, I recently got a new MacBook, and noticed that Wartune lags EXTREMELY bad on it. My crappy PC lagged less than it. I am still using google chrome (both pc's) and the difference in speed is massive. The game looks bad too. The only part that looks good on that retina display is the text haha! So, do I need to do something to make it stop lagging? Anybody else play on a Mac and have this problem? Do I need to use a different browser?
Thanks in advance guys!

[FinalHC]

What is the specs on the MacBook and the PC? Does the Macbook have a dedicated GPU? what about the processor specs?

[mattftw]

i have better luck with safari on my mac