Reduce the total amount of power needed from your Mac by reducing the number of bus-powered devices connected to your Mac, or using more of them as self-powered devices.

Bus-powered devices get power from the device they're plugged into, such as your Mac.

Self-powered devices get power from an electrical outlet or their own battery. Use your device as a self-powered device or connect it to a powered USB or Thunderbolt 3 (USB-C) hub if possible.The device doesn't turn on or isn't recognized by your Mac.For example, writing to disk requires more power than reading from it. An operation that requires more power doesn't work.

A message says that the device needs more power, the operation can't be completed, or USB devices are disabled until you unplug the device using too much power.

To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice.Symptoms such as these could mean that a device connected to the USB-A, USB-C, or Thunderbolt 3 (USB-C) port on your Mac isn't getting enough power: You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products.

This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice.

We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice.

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