Apple Insider reports that Apple's new Retina Display-equipped 15-inch MacBook Pro can power up to three external monitors
Other World Computing put the new flagship professional-level laptop through its paces by hooking it up to two iMacs in display mode via Thunderbolt and an LG monitor via HDMI while setting the machine's own display settings to "Best for Retina."Apple's new MacBook Pro with Retina Display can power 3 external monitors
Even with all four displays active, the new MacBook Pro did not appear to have any performance issues. "Moving images and media didn’t create any lag and we were able to play video on all four displays simultaneously," OWC wrote in a blog post about the experiment.