I've recently got my P2720DC but it hasn't got a LAN connection. My laptop is connect via USB Type-C cable (C to C) to the P2720DC. Is it possible to use a LAN adapter to USB-A and then connect it to the P2720DC and getting my MacBook connected via ethernet? I tried it but it didn't work out for me.
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Dell cannot speak to the not tested/validated Apple OS. We can see here that there are not any Apple OS drivers on the P2720DC driver page. For Dell Technical Support to offer assistance, you need to test the P2720DC on a true Windows OS PC. You should read the P2720DC threads on the Apple Forum. If need be, start a new thread on the Apple Forum detailing your issue. Perhaps they can offer some advice on how to get our P2720DC working on the Apple PC.