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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
Dear Apple Support,
I have a Retina Macbook Pro (2015 with ForceTouch) and despite supporting MST (as stated here) I am unable to daisy chain two modern Dell monitors. It just mirrors the screen to the daisy-chained monitor.
How can this be fixed?
Thank you in advance for your support.
Frédéric
MacBook Pro with Retina display, OS X Yosemite (10.10.5)
Unfortunately this doesn't seem to be fixable, yet. You could run windows using bootcamp, then it will work. Indeed even though OS X supports MST, it doesn't support daisy chaining. It only supports daisy chaining when you connect a thunderbolt display (everybody would cry: evil, if Microsoft did something like this).
I've created a post where I keep track of all topics I could find about this issue here:
Unable to daisy-chain two MST monitors
