Apple’s new 15 inch Retina MacBook Pro is the latest Apple device to support the 27 inch 5K display of Dell. Apple initially released OS X 10.10.3 in April with support for the dual-cable 5K monitor on the Retina 5K iMac in 2013 Mac pro, but no note books supported the display at the time.
Dell’s dual-cable 5K display requires more bandwidth than is currently supported over a current single DisplayPort cable, so it uses a dual-cable solution that takes up two Thunderbolt ports on a Mac. The availability of Intel’s Sky lake platform with Display Port 1.3 support later this year will enable Apple to update Macs with support for external 5K displays that function over a single cable, at which point the company could theoretically release a 5K Thunderbolt Display.
The support document also lists the high-end 15-inch Retina MacBook Pro as capable of driving most single-stream 4K displays (4,096-by-2,160) at 60Hz on OS X 10.10.3, becoming the first notebook to support single-stream 4K displays alongside the Mac Pro (Late 2013) and iMac (Retina 5K, 27-inch, Late 2014 and later).
Note that this requires the version of the 15-inch MacBook Pro with the AMD Radeon R9 M370X. That graphics chip is also required to operate Single-Stream 4K displays with a resolution of 4096 x 2160 at 60 Hz. Apple’s new Mac book pro launched earlier this month features the new Force Touch trackpad, along with faster flash storage, longer battery life, and the option for the R9 M370X.