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I just bought an Acer XB252Q gaming monitor that has 1080p 240hz.

I was wondering if I can output 1080p at 240hz with my 2017 MacBook Pro 13" with Touch Bar using a display port cable?

I ask because on HDMI it only outputs 1080p at 60hz.

  • 1
    And the MacBook in question would be....... Please edit your original question with details about which MacBook Pro you are using, the version of macOS. – Allan Apr 6 '18 at 19:07
  • macos High Sierra and a macbook pro 2017 with touch bar – Lucas Apr 6 '18 at 20:23
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Unfortunately, no.

Because your MacBook only has USB-C Thunderbolt, you will need a USB-C Thunderbolt to DisplayPort adapter. This Apple USB-C to DisplayPort adapter states that it can provide up to 60hz. This Apple article covers connecting UHD monitors with your Mac and states (paraphrased):

The MacBook Pro (2016 and later) can support these resolutions and refresh rates over HDMI 1.4b when using the USB-C Digital AV Multiport Adapter with macOS Sierra 10.12 or later: Up to 1080p at 60Hz 3840 x 2160 at 30Hz

Allan is correct, you will probably want an active Thunderbolt to Displayport adapter. I forget USB-C and Thunderbolt are not interchangeable terms.

  • While your overall answer is correct, your recommendation is flawed. Thunderbolt has native DisplayPort video so you don't go from USB to TB. You go from DisplayPort to HDMI; and I wouldn't do it with an Apple adapter - I would use an active adapter instead. – Allan Apr 7 '18 at 2:15
  • @Allan I forget USB-C and Thunderbolt aren't the same. Updated to include. – Unassuming Guy Apr 9 '18 at 14:59
  • It's confusing. What's on the MBP is Thunderbolt 3 which uses a Type C connector. Thunderbolt 3 has USB 3.1, DisplayPort, PCIe, andpower all on one cable so you just need to go from DisplayPort to HDMI. Just remember that USB-C is the connector type, not the specification - that would be USB 3.1 – Allan Apr 9 '18 at 15:15
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Hardware

MacBook: 2017 15" MacBook Pro (maxed out)
Display: AOC AGON AG251FWG2 (1920x1080@240Hz)

Using DisplayPort

I used this generic 4K@60Hz USB-C to DP adapter and it correctly handled 1080p@240Hz resolution on my MacBook.

Using HDMI

On my MacBook, I only get 1080p@120Hz since I only have a 4K@30Hz adapter (which would translate to 1080p@120Hz, logically).

However, on my Hackintosh (Vega 64), the maximum refresh rate I get is 1080p@144Hz. So there’s probably also a macOS + HDMI limitation.

FreeSync

Neither on my MacBook Pro, nor on my Hackintosh, FreeSync works in any of these configurations. I think it’s not supported at all by the macOS drivers.

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