Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter

Works perfectly as described. The connection is full, including Thunderbolt Display's camera, plugs in the back, in addition to audio and video which you can use HDMI to export from your Apple device to any TV monitor. (BTW, HDMI will NOT work in anyway on Thunderbolt Display).Cons: 1. new Apple devices have highest display resolution 3024x1964 but Thunderbold Display highest resolution is 2560x1440 (which was the highest at the time when Thunderbolt Display was built), so you will lose some resolution with the newer Apple devices;2. Ridiculously overpriced by Apple

Perfect. Worked great

I plugged this adapter into the back of the Studio Display, and connected an Apple Thunderbolt 2 cable to it from the Mac Pro 6.1. I have upgraded the Mac Pro 6.1 with Open Core Legacy Patcher and initially during setup with Sonoma it would not detect the Studio Display and I had to use an HDMI display to run through setup steps with the Studio Display disconnected. After the upgrade and installing OCLP root patches, I shut down and plugged the Studio back in and rebooted without the HDMI display and it works perfectly, with sound and camera functionality. The Mac Pro 6.1 won't do 5k resolution but does everything up to 4k without problem and looks great doing it. I can also easily run a second display using the HDMI port. I have found that during Mac OS updates I must plug in an HDMI display since the Mac overwrites the OCLP partition during the upgrade. When OCLP gets re-installed and patched I plug the Studio back in without issue. I am now running Sequoia 15.2 on the Mac Pro with OCLP v2.2 and it runs great. I had also tried a couple of HDMI to USB3/Thunderbolt cables purchased off Amazon to try and connect the Studio Display via HDMI, and neither worked at all.

This is a very expensive part, but comprises much more functionality than most ordinary 'adapters', and it works bi-directionally. As far as I can tell, there is *no* functional equivalent on the market.TB/2/3/4 each have unique capabilities. Each generation of Thunderbolt has specific capabilities, but it's the attached equipment that determine which functions are used. There are far too many combinations and permutations of Thunderbolt and attached equipment to described applicable technical details, particularly when in reality, most product offer few hard specifications.TB applications include video, storage, and data transfer, but many applications concentrate on some sub-set of these, leaving the other uses as an afterthought or not mentioned at all. The two common different functions are: attachments for data storage, and for video equipment. Most specs focus on one of these, leaving the other an afterthought. Which get attention is determined by the vendor's primary market. The situation is so complex that the user can rarely determine whether or how well their combination of equipment will work, especially because bandwidth can be allocated to each function in ways that differ among vendors.In the gamer world, focus is on Thunderbolt display refresh rate using DisplayPort video/audio.Among "Professional" users, Thunderbolt is used for transfer and backup of video files produced by the 4K+ video cameras. The files are so large that high speed transfer is essential to get the daily tasks finished.Consequently, most products focus on one or the other of these, the remainder an afterthought, or un-mentioned.This is the nature of an industry that attempts to "standardize" everything, failing to recognize that "letting the marketplace decide" is to have, effectively, no standard. You're on your own.I suggest reading Wikipedia's overview of "USB" and its generations. Vendors have made a complete mess of that marketplace, and they're out to do the same for Thunderbolt.The bottom line for anyone interested in Thunderbolt can be bolded down to1) look for "Intel Certified Thunderbolt" device,and2) the lightning symbol, with a number on Thunderbolt cable ends, signifying the generation and supported data rate. Otherwise, they may be USB4, but they aren't Thunderbolt.

It works. I can connect my 2019 MacBook Pro (the one with the touchbar and usb-c/thunderbolt ports only) to my old thunderbolt apple cinema 27” thunderbolt 2 monitor (the one with the lightning icon on the video plug, not the mini dvi box looking thing). I can control brightness, it plays sound well. Saves the old monitor from the landfill.4 stars because it overpriced dongle problem apple created by not following standards. Also when using Teams for video conferencing my video signal from the camera in the display gets severely crushed/pixelated by the dongle. It’s like it only has enough throughput to send the image to the monitor, not back to the computer from the camera. I just use the laptop camera. Otherwise works great.EDIT: the dongle also does not have enough throughput to transmit sounds from the microphone clearly. In summary. it does well sending sound and images from the laptop to the display, but poorly at sending video and microphone signal back to the laptop. TLDR; you have to set your video camera and microphone to your laptop sources to get good quality when in a video conference.