Accessory needs more power LED Cinema Display and Mac Studio

Question

Accessory needs more power LED Cinema Display and Mac Studio

I have successfully connected an LED Cinema Display to a Mac Studio M1 Max using an adapter. The display functions correctly with the adapter. However, the system consistently displays an alert indicating that the accessory requires additional power. The Cinema Display has its own power cord, and the monitor is connected to one of the Thunderbolt 4 ports located on the rear of the device. I would appreciate any suggestions you may have to resolve this issue. Thank you for your assistance.

Mac Studio, macOS 15.3

Posted on Mar 27, 2025 1:41 PM

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Answer 1

tbirdvet

Level 6

15,659 points

Mar 29, 2025 5:04 PM in response to Tom Poehlmann

Do you have other hardware connected to the other T B ports on the Mac? If so you may have over loaded the bus. See what happens if you remove the other hardware (one at a time). If you do not have any other hardware then I'm not sure why you are getting this message. The other possibility is that the adapter is not the most efficient and may need to get changed.

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Answer 2

Mar 30, 2025 5:12 PM in response to tbirdvet

Thanks for the advice. I get the same message when the Display is the only external device connected to the Studio. I'll see if I can find a different brand adapter and see if that helps.

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Accessory needs more power LED Cinema Display and Mac Studio