I've just bought a brand new MacAir. It states in the technical specs that it comes with 2 x USB 3.0 (up to 5GB) ports... However... when I check the specs: About this Mac> More Info >Hardware >USB It shows up: USB 3.0 SuperSpeed Bus USB 3.0 HighSpeed Bus Under the 3.0 HighSpeed Bus, it says: USB 3.0 Hi-Speed Bus: Host Controller Location: Built-in USB Host Controller Driver: AppleUSBXHCI PCI Device ID: 0x9c31 PCI Revision ID: 0x0004 PCI Vendor ID: 0x8086 Bus Number: 0x0a BRCM20702 Hub: Product ID: 0x4500 Vendor ID: 0x0a5c (Broadcom Corp.) Version: 1.00 Speed: Up to 12 Mb/sec Manufacturer: Apple Inc. Location ID: 0x14300000 / 2 Current Available (mA): 500 Current Required (mA): 94 Bluetooth USB Host Controller: Product ID: 0x828f Vendor ID: 0x05ac (Apple Inc.) Version: 0.78 Speed: Up to 12 Mb/sec Manufacturer: Apple Inc. Location ID: 0x14330000 / 4 Current Available (mA): 500 Current Required (mA): 0 I'm confused... Does this mean only 1 port is true USB3.0? NB: I took my new MacAir back to the Apple store today and they replaced it with a brand new one, however straight out of the box it has the above specs, which was the same as the other machine so I'm wondering if I'm missing something here...?