All MacBooks have supported the USB 3.1 Gen 1 devices through its USB ports since 2011.
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This is just a rebranded version of the old USB 3.0 spec which we know as SuperSpeed USB.
All though there shouldn’t be complains about its speed as it gives a throughput time of 5Gbps but a faster USB standard does exist which might me supported by upcoming Macs.
This has been estimated after having a look at the data in Apple’s macOS Sierra betas according to 9to5Mac.
It appears as if Apple has decided to offer us the USB 3.1 Gen 2 ports which are dubbed as SuperSpeed+ USB.
This USB standard offers a throughput time of 10Gbps, double of what we are getting at the moment.
An alternative theory could be that Apple is simply making its hardware compatible with the ports for the future.
On the other hand the increased 10Gbps support indicates the arrival of thunderbolt 3 instead of increased USB speeds.
Regardless of what we get in the end, the fact that new hardware is on its way is a reason for excitement.
With the rumors of the new OLED touch-sensitive strip above the keyboard circulating for quite some time now, new hardware could be an actual possibility.