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How to connect two monitors to M1 Mac Mini using a Thunderbolt Dock?

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I'm trying to find a solution to switching external monitors between an M1 Mac mini and an Intel MacBook Pro by replugging a single Thunderbolt cable. **Equipment** - Two [Dell U2720Q/U2720QM](https://www.amazon.com/Dell-U2720QM-UltraSharp-Ultra-Thin-DisplayPort/dp/B08F5J8S6Y/) monitors (supports video signal from USB-C, HDMI & DisplayPort) - [OWC Thunderbolt Hub](https://www.owcdigital.com/products/thunderbolt-hub) - [M1 Mac mini](https://support.apple.com/kb/SP823?locale=en_US) - [2019 MacBook Pro 16"](https://support.apple.com/kb/SP809?locale=en_US) **Connections** - Monitor 1 is connected to the OWC Hub with a Thunderbolt 3 cable. - Monitor 2 is connected to the OWC Hub with a USB-C cable (cable came with the monitor). - Monitor 2 is connected to M1 Mac mini with an HDMI cable (cable came with the monitor). **Problem** When I plug the M1 Mac Mini to the OWC Hub with a Thunderbolt 4 cable (came with the Hub), macOS recognizes two external displays but route both HDMI and DisplayPort over USB-C signals to the same display - Monitor 2. Switching inputs on Monitor 2 shows the different macOS spaces of the same machine (the M1 Mac Mini). If I unplug the USB-C cable going to the Monitor 2 from the Hub, macOS reconfigures itself to route DisplayPort over USB-C to Monitor 1 and HDMI to Monitor 2 (this is the desired state). Plugging USB-C cable going to Monitor 2 back to the OWC Hub after that doesn't change the layout. When the MacBook Pro is plugged into the OWC Hub instead of the M1 Mac Mini, everything works as expected - the system recognizes and uses both monitors as external displays. **Question** How can I configure macOS to always route DisplayPort over USB-C to Monitor 1 and HDMI to Monitor 2?
Asked by V G (11 rep)
Jun 15, 2022, 11:32 PM
Last activity: Jul 6, 2024, 09:05 AM