OS X 10.10.3 brings enhanced 4K support (including 12-inch MacBook), adds … – 9 to 5 Mac (blog)


Apple has expanded support for 4K displays in its recent OS X 10.10.3 release and officially confirmed specifics for using 4K displays with its new 12-inch MacBook.

While previously Apple only officially supported certain Multi-Stream Transport (MST) displays at a refresh rate of 60Hz, it now says that “most single-stream 4K (3840×2160) displays” are officially supported at 60Hz as well following the recent OS X Yosemite v10.10.3 update. That should mean support for a lot more inexpensive 4K displays that don’t include DisplayPort’s Multi-Stream Transport feature.

A full list of Macs that will support Single-Stream (SST) displays with a 60Hz refresh rate include:

-MacBook Pro (Retina, 13-inch, Early 2015)
-MacBook Pro (Retina, 15-inch, Mid 2014)
-Mac Pro (Late 2013)
-iMac (27-inch, Late 2013 and later)
-Mac mini (Late 2014)
-MacBook Air (Early 2015)
-MacBook (Retina, 12-inch, Early 2015)

SST displays running at a resolution of 4096×2160, however, are only supported at 60Hz on the Mac Pro (Late 2013) and iMac (Retina 5k and 27-inch, Late 2014).

For Apple’s new 12-inch MacBook, the device will support displays running at a resolution of 3840×2160 at 30 Hz or 4096×2160 at 24 Hz over HDMI. Since the device only has a single USB-C port, you’ll need a USB-C Digital AV Multiport Adapter. Technically it’s possible Apple could support monitors hitting the market that use HDMI 2.0 at 60 Hz, but you’ll of course still need the appropriate USB-C adapter.

If you want 60Hz on the new 12-inch MacBook, you’ll need an SST display, DisplayPort cable, and OS X 10.10.3. Although you’ll also need to get an adapter in order to go from the 12-inch MacBook’s 1 USB-C port to DisplayPort on the display— like this one.

Additionally, Apple’s update to its 4k support doc confirms that it’s officially supporting Dell’s new UP2715K 27-inch 5K display following the OS X 10.10.3 update on the Mac Pro (Late 2013) and iMac (Retina 5k and 27-inch, Late 2014).

Our 4K monitor comparison is here. 

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8 Responses to “OS X 10.10.3 brings enhanced 4K support (including 12-inch MacBook), adds 5K Dell for Mac Pro/iMac”

  1. adisor19 says:

    So Is there an USB-C adapter for DisplayPort that also has a USB-C power injector so that I can use an external 4K monitor and charge the laptop at the same time ?!


  2. So could this mean that USB-C Cinema Display is coming so we can actually use the new MacBook?


  3. -MacBook Pro (Retina, 15-inch, Mid 2014) supported.

    They can’t say the Retina, 15-inch, Late 2013 is not supported? The only difference is a the base model coming with 16GB (can’t be an issue, other 8GB devices are supported) and a TINY 0.2GHz spec bump. It’s the same Intel Iris Pro iGPU.

    Hope they are just mentioning the Mid 2014 because it’s the newest, but it would be very disappointing if the Late 2013 model isn’t supported. I thought Apple would be different then other company’s…


    • From Apple’s website:

      MacBook Pro (Retina, Late 2013 and later)
      Mac Pro (Late 2013)
      iMac (27-inch, Late 2013 and later)
      Mac mini (Late 2014)
      MacBook Air (Early 2015)
      MacBook (Retina, 12-inch, Early 2015)



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