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1up These Mac computers support multi-stream transport (MST) displays at 60 Hz:
MacBook Pro (Retina, 15-inch, Late 2013) and later
MacBook Pro (Retina, 13-inch, Early 2015) and later
Dell UP2414Q and UP3214Q: Choose Menu > Display Setting > DisplayPort 1.2 > Enable
Your Mac will automatically detect an MST-enabled display. However, your display might require a firmware update to support 60Hz operation. Contact your display's manufacturer for details.