3 ms·That's pretty much just the Retina MacBook right there.by nwh 13y agoThat's pretty much just the Retina MacBook right there.tomlu 13y agoMy retina gets about 3-4 hours, so I don't think 8 hours is a real possibility.nwh 13y agoDisable your dedicated GPU. http://gfx.io/ http://gfx.io/