Can USB-C pd cause damage on a Mac mini

It won't cause damage. The Mac mini will ignore any power coming in on it's USB-C ports. I've been using my Mac mini for years plugged into a display that would provide power if it were plugged into a laptop.

ElbertNagel Said:

"Can USB-C pd cause damage on a Mac mini: Thanks for your reply! We already have the aforementioned docking station which is used in combination with a windows laptop. I just wanted to know if I could plug in the USB cable or if I have to plug in the HDMI cable to be safe. Also thanks for the heads about the dual monitor setup! I'll look into that.”

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You are welcome.

You're fine plugging it all in. To the same port.

ElbertNagel Said:

"Can USB-C pd cause damage on a Mac mini: I have a Lenovo Thinkpad USB-c docking station. The dockingstation can be used to charge a laptop through te USB-C cable. Is it safe to connect a powered USB-C cable to a Mac mini? Or wil it cause damage?"

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Please Clarify your Post:

What are you looking to achieve with this?

Getting Multiple External Displays:

You docking station is not made to get dual monitors. To do that you need to use two docking stations, or this particular docking station, which allows for dual monitors: The J5 USB-C Dual HDMI Docking Station allows for more than two extra monitors. How so? Well, plug in a display projector the Mac using the USB-C Digital AV Multiport Adapter and then plug the J5 hub with 2 HDMI displays (one 4K), and then you'll have 3 external screens. It all mirrors and extends.