Asteroid was good for a while but I don't like it's slow startup time (since my MacBook Pro with Retina laptop has two GPUS which are both able to mine since the haswell iGPU and the Nvidia GPU can both run OpenCL).
If there's a mining client based on cgminer (as it supports stratum without fuss) with a GUI that works on the PC and Mac,it'll be great for me as my Macs 2 GPUs can do well with very low difficulty currencies (when the pool auto switches to them) too.
Thanks for the help.
i was unable to successfully get cgminer working for my macs (low end video cards, mostly 6850s etc). however, don't let that stop you from trying; i may have had bad luck or broken permissions or something. I didn't end up trying too hard, so went directly to cobbling windows systems together for the dedicated miners. I am on windows now, but am picking at the linux based BAMT to eventually upgrade my 3 card systems into 5 or 6 card miners (win7 has a max support of 4 cards).
definitely consider not mining on the macbook pro; the fan cannot keep up with the heat that comes out of scrypt hashing. i do know laptops that have overheated quickly from mining. the mac pro is better for heat removal; plus if you have a mac pro, you're already accustomed to the jet-aircraft intake noise!
try guiminer for windows; it has the same settings and from what people have been reporting on the litecoin hardware comparison chart, there doesn't seem to be a difference in reported hash rates from guiminer vs. cgminer.