How do i know if my macbook has usb 3.0 Support?

USB 3 (also known as "SuperSpeed USB") is the latest USB standard which offers significant performance improvements over USB 2 ("Hi-Speed USB").

USB Transfer Rate Comparison: 

• USB 3 - transfer data up to 5 Gbps.
• USB 2 - transfer data up to 480 Mbps.  
• USB 1.1 - transfer data up to 12 Mbps.

Use the System Information utility to find out if your MAC has USB 3.0 Support or not. 

1. From the Apple () menu, choose About this Mac.  
2. Click More Info.
3. Click System Report.
4. In the Hardware section of the System Report, click USB.
You will see a USB 3 section and a USB 2 section. USB 3 devices will appear in the "USB 3.0 SuperSpeed" section. Other devices will appear in the "USB Hi-Speed" section.