The RocketStor 6361A is a ruggedly constructed, ultra-slim PCIe Expansion solution designed for Thunderbolt & Thunderbolt 2 capable Mac platforms, and is the easiest, most cost-effective way to add PCIe connectivity to MacBook"s Mac mini"s, iMac and Mac Pro systems. Ultra-Slim Thunderbolt 2 PCIe Expansion Chassis: The RocketStor 6361A allows you to quickly add any PCIe x4/x8 /x16 card to your Thunderbolt capable system, such as media capture, Ethernet, Fiber Channel, or external Storage/RAID controller cards. The ultra slim, lightweight design is ideal for Mac Pro workstations & MacBook portables. Compact, Space Efficient Design: The RocketStor 6361A may be the industry"s most compact and lightweight PCIe expansion solution. The unit is only 2.3" wide, stands less than 7 inches tall, and weighs less than 4 lbs., yet is capable of supporting full-sized PCIe cards! Dual, Ultra-Quiet Cooling Fans Keep Temperatures under Control: Some PCIe devices can generate a great deal of waste heat during heavy I/O; an efficient, reliable, cooling system is an essential component of any PCIe expansion solution. The RocketStor 6361A"s ventilated, all-aluminum chassis and dual cooling fans keep temperatures in check during high-stress workloads. Plug and Play Installation: The RocketStor 6361A can be easily added to any Thunderbolt capable Mac platform via a single cable connection. The lightweight chassis is easy to handle, and the quick release thumbscrews make adding or removing PCIe cards a snap! Quickly Add or Remove any PCIe Card: RocketStor 6361A PCI expansion chassis were designed to host any Thunderbolt Aware PCIe cards up to 7.87 inches in length, and are the perfect I/O connectivity solution for MacBook portables; whether adding a video or audio capture card, Networking/Fiber Channel support or external storage expansion. The RocketStor 6361A can transform your Thunderbolt capable laptop into a portable workstation!