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Connect 2 x 30” Apple Cinema Displays to MBP mid 2012 13”
Is it always the one connected to the OWC’s miniDisplayPort? If you switch displays and dual-link DVI adapters, do both displays work individually via the OWC’s miniDP? Neither of the two works via the OWC’s USB-C, right?
Both displays are detected. Click on Scaled for the display that is black and try going through the options.
Apple confirms here that your MBP can drive two Thunderbolt Displays. Your setup is similar (two DP sinks from a single TB port), albeit using one TB3 controller instead of two daisy-chained TB1 controllers. What version of macOS are you running?
You could try the following: MBP > OWC TB3 dock > Wavlink TB3 dock (i.e. daisy-chaining the TB3 docks). Connect one ACD to the OWC using its miniDisplayPort. Connect the other to the Wavlink using one of its DisplayPorts.
That's interesting. The Intel HD Graphics 4000 can drive three displays.
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Is it always the one connected to the OWC’s miniDisplayPort? If you switch displays and dual-link DVI adapters, do both displays work individually via the OWC’s miniDP? Neither of the two works via the OWC’s USB-C, right?
Yes it's always the one connected to the OWC's miniDisplayPort. Yes and Yes to the next two questions.
Both displays are detected. Click on Scaled for the display that is black and try going through the options.
Tried this but had no effect.
What version of macOS are you running?
Catalina 10.15.7
You could try the following: MBP > OWC TB3 dock > Wavlink TB3 dock (i.e. daisy-chaining the TB3 docks). Connect one ACD to the OWC using its miniDisplayPort. Connect the other to the Wavlink using one of its DisplayPorts.
Kinda didn't want to be using both as I need to sell one of them.
Yes it's always the one connected to the OWC's miniDisplayPort. Yes and Yes to the next two questions.
Both displays are detected. Click on Scaled for the display that is black and try going through the options.
Tried this but had no effect.
What version of macOS are you running?
Catalina 10.15.7
You could try the following: MBP > OWC TB3 dock > Wavlink TB3 dock (i.e. daisy-chaining the TB3 docks). Connect one ACD to the OWC using its miniDisplayPort. Connect the other to the Wavlink using one of its DisplayPorts.
Kinda didn't want to be using both as I need to sell one of them.
You could try the following: MBP > OWC TB3 dock > Wavlink TB3 dock (i.e. daisy-chaining the TB3 docks). Connect one ACD to the OWC using its miniDisplayPort. Connect the other to the Wavlink using one of its DisplayPorts.
But I will give it a try though
Once you have downloaded AllRez and extracted the archive, open Terminal using Spotlight. Drag the
AllRez executable (it has a black icon) from the For 10.9 - 13 folder into Terminal (but don't press Enter yet!), add a space and type > AllRez_output.txt. Press Enter now. Attach the AllRez_output.txt file this generates (it will be in your user folder) to a post.This is just a test if two daisy-chained Thunderbolt controllers make a difference.
Can you elaborate? What happens if you turn mirroring off?
It shows that both displays are detected and driven by the HD 4000, so two DisplayPort streams are there and extracted (provided) by the Thunderbolt dock. So far so good.
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And when it’s on, both work and display the same image? Or what’s happening then?
No problem.
It’s possible. Daisy-chaining the two TB3 docks doesn’t require that adapter.
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I checked your EDIDs from #41 . Both Cinema displays are the same model made within 3 weeks of each other so they should be interchangeable. If one doesn't work, you can make it work by disconnecting the other that does work?
They both support HDCP so there should be no problem with that.
Where's the AllRez output for the setup that Graphics/Displays showed at #59 ? Can you do the same setup without hardware mirroring?
Each display will use a separate x1 Thunderbolt channel, 6.5 Gbps each since each channel allows only 10 Gb/s.
What CPU does your MacBook Pro (13-inch, Mid 2012) have?
They both support HDCP so there should be no problem with that.
The AllRez output shows only one Apple Cinema Display connected. The first display is the 1280x800 built-in display. What does Graphics/Displays show in System Information.app?
Where's the AllRez output for the setup that Graphics/Displays showed at #59 ? Can you do the same setup without hardware mirroring?
It looks like the Thunderbolt 3 dock is connected correctly. Thunderbolt 1 max connection is 10 Gb/s x2 with x1 link width.
Each display will use a separate x1 Thunderbolt channel, 6.5 Gbps each since each channel allows only 10 Gb/s.
What CPU does your MacBook Pro (13-inch, Mid 2012) have?
- 2.5GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB L3 cache
- 2.9GHz dual-core Intel Core i7 processor (Turbo Boost up to 3.6GHz) with 4MB L3 cache
This article doesn't differentiate between the i5 and i7: both are said to drive two external displays. My MacBook Pro (13-inch, Early 2011) can do it, and so can a 2012 MacBook Air.
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