CHENYANG CY Thunderbolt Port to USB 3.0 Super Speed Hard Disk Drive Adapter Dongle for Apple Macbook Imac 2014 2015 The adappter only work for thundebolt port, it can not work for mini displayport port. Free Driver for MAC-OS, Driver need for Windows.(ASMedia ASM1042A Driver) The adapter only work for USB3.0 Device like usb keyboard, mouse, hard disk, flash disk. it don't work for any video,audio and capture device. Some USB 3.0 hard disk can't work because it need high power. (you need to connect the extral power cable).You can test it with usb flash disk first. Easily connect your Thunderbolt-equipped Mac or PC to an USB device with the Thunderbolt to USB 3.0 Adapter. Small and compact, it connects to the Thunderbolt port on your Mac or PC computer, giving you an extra USB 3.0 5Gbps port.