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I have the following issue. I bought a MacBook Air M1 (basic version) and I wanted to connect it to my external monitor (Samsung C34H890WJUX Curved monitor) via USB-C. MacBook battery is charging when it's connected to the monitor, but external monitor is not recognized! I'm sure my cable and external monitor works fine because it works with my old Thinkpad with Linux via USB-C and it works with MacBook Pro 2017 via USB-C, but it doesn't work with MacBook Air M1 with macOS Monterey. I read somewhere on the web that it works only with display port, but I don't want to buy any additional dongles or cables until I'm sure that it really works. Ideally I would like to make it work via USB-C.

Regards, Piotr

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  • Please detail which monitor you have.
    – jksoegaard
    Mar 14 at 10:07
  • I have Samsung C34H890WJUX Curved monitor, but it seems to be an issue with the MacBook Air, because it works fine with other laptops via USB-C. Mar 14 at 10:09
  • It's a superwide display, so it could make a difference definitely. When you plug in the monitor - are you saying it does not appear at all in System Preferences > Displays? - What about in System Report?
    – jksoegaard
    Mar 14 at 10:27
  • It does not appear in System Preferences -> Display. I can see only built-in display there. I don't know where to find System Report. I also ordered USB-C -> display-port cable and I'll check this connection in the nearest days. Mar 14 at 10:51
  • Click the Apple logo at the top-left. Click "About this Mac". Click "System Report".
    – jksoegaard
    Mar 14 at 11:16

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Okay, I received my USB-C -> Display Port cable at it works with my external monitor. It seems that MacBook Air M1 simply does not work with USB-C -> USB-C cable for connecting external displays and it just charges the battery.

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  • Which USB-C cable do you use to connect? Mar 17 at 6:06
  • I don't know exact technical details of this cable. It's non-apple regular USB-C -> USB-C cable. I'm pretty sure, this issue is not related to this cable, because it works with ThinkPad laptop (with Linux) and older MacBook Pro (Intel i5) laptop. It doesn't work with the new MacBook Air M1 laptop only. Mar 18 at 11:44
  • I would suggest trying with a full thunderbolt cable just to see if that helps. Mar 19 at 11:52
  • How can I verify that a specific USB-C cable is "full thunderbolt" and what does it mean? I don't want to buy more cables just to check if they work and how could you explain the fact that my current cable works correctly with MacBook Pro 2017 and Thinkpad via USB-C? If it wasn't "full thunderdolt" I suppose, It wouldn't work with these computers either. Mar 20 at 12:56

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