I recently purchased an LG UltraFine display. On the back it has a USB-C (Thunderbolt 3) port to connect to the computer (no other ports - there are some downstream USB-C ports but that's it). When I connect the display to my recent MacBook Pro, it works fine.
However, I also have an older iMac (27-inch, Late 2014) that I'd like to try to connect it to... if I can hook it up somehow! The 2014 iMac has some USB-A ports on its rear, as well as Thunderbolt 2/MiniDisplayPort. Some googling suggests the Thunderbolt 2 port won't work, as no adapters exist. So, it feels like my best option, if it's possible, is to connect the USB-C monitor to the iMac via USB-A.
Can this be made to work? If so, what do I need to connect it? I'm not worried about getting full resolution or anything, just using it as an external monitor with the iMac at all.