How do I tell what version of DisplayPort is support on a Mac’s Thunderbolt port, when running macOS El Capitan or Sierra?

I tried using the System Information app.

  • No item listed for “DisplayPort”.
  • The “Graphics/Displays” item lists video cards.
  • The “Thunderbolt” item has no information about DisplayPort.

My Samsung 4K monitor has an switch setting for either DisplayPort 1.1 or 1.2. So I'd like to match appropriately to my MacBook Pro.

Apple does not document this important information. For example, this Apple Support page, Mac mini (2018) - Technical Specifications says only:

Thunderbolt 3 digital video output supports Native DisplayPort output over USB-C

Four Thunderbolt 3 (USB-C) ports with support for: DisplayPort

…with no mention of which version of DisplayPort standard.

This Question seemed to be asking this question. But it is not exactly clear. And no Answer directly addressed the issue.

  • What model Mac are you running? And what macOS? – Monomeeth Oct 15 '16 at 6:57
  • @Monomeeth Answered (El Capitan or Sierra). As for which Mac model, I am looking for an answer that works across various Macs; I am asking how to look up the version of DisplayPort supported in general, not for this one specific Mac. – Basil Bourque Oct 15 '16 at 7:13
  • Based on en.wikipedia.org/wiki/Mini_DisplayPort, it sounds like if the output does not support 4k, it's 1.1, and if it does, it's 1.2. Not an Apple reference, I know. – Marc Wilson Jul 13 at 22:28
  • You said, "So I'd like to match appropriately to my MacBook Pro.", so what version is your MacBook Pro? – user3439894 Jul 13 at 22:38
  • @user3439894 MacBook Pro (late 2013) with discrete GPU card. But the Question is more general than than one specific model. – Basil Bourque Jul 13 at 23:23

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