About USB on Mac computers - Apple Support
2021-5-21u2002·u2002The specification of a USB port determines the maximum data-transfer rate (speed) and power delivered by the port. This is important primarily when you want the most speed for your USB device, or when your USB device needs more power than it's getting.. To learn which specification a USB port on your Mac supports, choose Apple menu > About This Mac, click Support, then click …
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