Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: I have the new Macbook Pro with retina display. Do I have to purchase this adapter AND the firewire to thunderbolt cable?
Document: Got a new MacBook Pro and had my old MacBook Pro on a backup 400 firewire Hard Drive with Time Machine Software.Connected the elago firewire 400 to the Apple Thunderbolt adapter. No problem at all. Just the same speed as before. Transfer with no problem.
I'm very happy with this product. It does exactly what I need it to do. I use this as a converter to hook up my Digi002 interface that uses firewire 400 to my early 2011 macbook pro that uses firewire 800 and it works flawlessly. If you intend to use this with a macbook pro you may find it a little bit of a tight squeeze if you have this as well as a cable attached to the thunderbolt port. Doesn't really bother me though
This adapter works perfectly to connect my audio mixer to my MacBook Pro laptop (via an Apple Cinema Display). All the audio, mixer control, and recording apps work perfectly in the bidirectional FireWire communication mode without any issue.
When I bought my MacBook Air, I needed a way to connect my older video camera to it. The camera cable is FireWire 400, and I looked in vain for an adapter that would go straight from that to Thunderbolt. No luck, but combined with a FireWire 800 to Thunderbolt adapter available from Apple (for 3 times the price of this adapter, of course), this elago product allows me to connect my camera again!
i have a new iMac with a Thunderbolt input. No Firewire port is available for my older DV camera input to capture old movie files. The cable I have to transfer my movie files is a FireWire 400, so this allowed me to adapt my cable from the old 400 to the new 800 dongle adapter to Thunderbolt and transfer my movies to iMovie or Adobe Premier Elements 12. Good price too!
This was the least expensive adapter I could find, and it does the job well. I attached this to an Apple Firewire-to-Thunderbolt adapter to capture footage from an old Hi-8 Sony Handycam video camera with my MacBook Pro with solid state hard drive. I've had it for a few months now, converting old tapes to digital.
The elago FireWire 400 to 800 Adapter for the MacBook Pro works as advertised. A BIG THANKS.BUT! Other stuff, not so great. Cables for my iPhone 3GS, the different types for inside the home and the car, all but one of them returns on the iPhone screen, Not suitable for this appliance. Only one cable has worked. It was more trouble returning them so I chalked it up to a bad experience.
I have a &#34;legacy&#34; Firewire audio recording interface. My very new MacBook Pro has the newer port. This adapter took care of the problem, transmitting both data and power.
I have had my firewire 400 portable hard drive without being able to use it with my new macbook pro for a while now. This is a portable adapter that fits perfectly with my mobile HD. Strongly recommend this adapter!
This product works great with my pro-fire 2626, from its firewire 400 to 400, i needed an adapter for my macbook pro because it was firewire 800. It goes in fine and snug into the macbook, but the part where i plug in a cable it may seem like it is fully in, but if slightly moved sometimes it becomes disconnected, its not THAT big of a deal at all its just very sensitive to its positioning on the cable. Other than that it works perfectly!
Answer: Yes you would need to purchase the firewire to thunderbolt cable. This adapter is Firewire 400 to 800. I know the adapter I have for my MBP with Retina it is Thunderbolt to Firewire 800.