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Is it possible to Daisy Chain two Dell u2715h monitors connected to a MacBook Pro 2017?
So the setup would be USB-C to DP cable from the MacBook to first monitor and then the first monitor connected to the second monitor - known as Daisy Chaining.
john
Posted 2017-11-05T15:30:37.317
Reputation: 176
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I tested the exact setup on a MacBook Pro 2017 with Sierra and, after an update, also High Sierra.
It did not work. The two monitors will mirror each other and not extend the display.
I don't know why it does not work - Apple says, that the following MacBook Pro's support MST (Multi-Stream-Transport). Taken from this official apple documentation
I have read other places that other users have the same problem. I am guessing it is a software/driver problem as it works with a windows pc and other users have reported that it works on a mac running windows.
john
Posted 2017-11-05T15:30:37.317
Reputation: 176
1
Actually, the 2017 Macbook Pros when used in conjunction with the OWC Thunderbolt 3 dock worked for me. I connected two BenQ monitors with that dock and got the two monitors plus the MBPs screen to come up as separate entities. No work required. Used a Display Port to Thunderbolt (USB-c) cable and a Display Port to mini-Display Port cable. The thunderbolt connector and mini-DP connector were both plugged into the Thunderbolt 3 dock and the dock was plugged into one port on the MBP.
user852541
Posted 2017-11-05T15:30:37.317
Reputation: 11
1Someone anonymously added "This solution is only applicable to connecting multiple displays via separate discrete ports, but not in relation to daisy chaining monitors via display port and the multi-stream transport capabilities of the MacBook Pro." to the post. This should have been a comment and I've voted to reject edit. – davidgo – 2017-12-17T20:36:31.097
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It may be possible. Configure as MBP --> DP1.2 --> DP. You must turn DP1.2 off at the 2nd display. Otherwise, the 2nd will mirror the first.
Sungwoo Park
Posted 2017-11-05T15:30:37.317
Reputation: 1
4Thanks for your response, but I tried that. I tested the setup and followed the exact configuration you mention - as given by Dell. It even works from a windows computer, but changing only the cable from windows machine to MBP, it does not work. I really cannot believe why people are not more upset about this. – john – 2017-11-22T13:52:12.620
I confirm that configuration does not work with MBP 15'2018 – kza – 2019-05-28T05:38:29.803
this setup doesn't work on MacOS, since they don't support a full-fledged daisy chaining (MST) over DisplayPort. I confirmed on my MBP15"2018 after a week of bying different cables, dongles, and HyperDrive adapter. – Farside – 2019-07-29T08:56:00.193
1FYI, we have had reports of the same behavior for Dell U2414H monitors and Dell U2515Hs — when daisy-chained, Windows treats them as an extended monitor, but macOS just mirrors one display. – Scott – 2018-09-19T18:20:43.803
2After reading that official Apple documentation about four times I think the support for MST it's referring to is 5K monitors that require MST in order to support the single monitor off a single cable. There's no mention on the page about daisy chaining. – Yogh – 2018-11-16T17:47:53.487