144hz on MacBook Pro with HDMI

johnnylhelding · Jan 24, 2018

Hello,

I'm looking to buy a 144hz monitor and preferable connecting it to my Mac, however I've read on somewhere that macOS Sierra doesn't support HDMI at 144hz. Is that wrong, or will bootcamp to windows 10 work. Not looking to buy an adapter.?
Thanks

Barty1884 · Jan 24, 2018

Which MacBook specifically?

I expect you need an adapter anyway? Thunderbolt or DisplayPort to HDMI?

1080p 144Hz is supported by HDMI1.3 or greater.

Anything >1440p 75Hz or 4K 30Hz needs an HDMI 2.0 output and, while some adapters do exist to take DP to HDMI, not all are equal and will depend on the implementation.

DisplayPort/Thunderbolt rev 1.2 can do 1080p 240Hz, 1440p 165Hz and 4K 75Hz (1.3 can do 240Hz 1440p and 120Hz 4K)

johnnylhelding · Jan 24, 2018

Barty1884 :

johnnylhelding · Jan 24, 2018

It’s macbook Pro 13’ early 2015,
So i Can do a normal hdmi cable to the monitor, if the monitor supports it. And still get 144, Otherwise i Would need an adapter

Barty1884 · Jan 24, 2018

johnnylhelding :

No, apparently not:
https://support.apple.com/kb/sp715?locale=en_US

HDMI video output
Support for 1080p resolution at up to 60Hz
Support for 3840-by-2160 resolution at 30Hz
Support for 4096-by-2160 resolution at 24Hz

So, they're either using HDMI1.2 (which is odd as 1.4 has been available in consumer products since 2009).....
Or
There's some limitation in the OS/Hardware*. You'd need to go miniDP to HDMI to achieve 144Hz.

*The reverse is true on newer monitors specifically for Apple products. You can achieve >Hz than a Windows based equivalent...... so I supposed it's not unheard of for their to be a prior restriction.

johnnylhelding · Jan 24, 2018

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