Some Apple devices can request extra power only when your Mac is awake or started up from macOS.Īlcohol is not available for Mac but there are a few alternatives that runs on macOS with similar functionality. Make sure that your Mac is awake and started up from the Mac operating system.To get firmware updates for Apple accessories, update your Apple software. If your device has software (such as drivers or firmware) that can be updated, make sure that it's using the latest software from the manufacturer.For example, if your device is connected to the ports on the left side of MacBook Pro, connect to the Thunderbolt 3 ports on the right side. If your Mac has multiple Thunderbolt 3 ports, connect your device to a Thunderbolt 3 port farthest away from the current port.If you're using an adapter with your cable, the adapter could also be damaged or defective. Try a different cable, in case the cable that you're using is damaged or defective.For example, a device designed to support the USB 3 specification might not get enough power when plugged into a USB 2 port or cable. Make sure that the port on your Mac and the cable you're using to connect it to your device both support the same or later USB specification as your device.Plug your device directly into your Mac instead. If your device is plugged into another device (such as a display or multiport adapter) as part of a chain of devices, the other device might not be providing enough power or passing through enough power from your Mac.
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