Works with iMac 27. Clarification, works at 4 K for 30 Hertz. It's not enough to play, but absolutely enough to watch movies. All films are shot in 24 Frames, which is accordingly below the 30 that the cable produces. I summarize, there are no problems with watching movies.
Grade A cable, i love ugreen and buy all their stuff. Working great on my 4K monitor. (60hz) shipment fast. ! This cable can only handle 30hz if your monitor is 4K. Really sneaky that they call it a 4K cable. Yes it can handle 4K but only at 50% of the frames your monitor can handle.