VULKAN on gtx 680mx bootcamp xplane11

Hi, I’m trying to update the Nvidia GeForce GTX 680MX graphics driver mounted on an iMac 2012 which uses bootcamp and Windows with X-Plane11 though. I tried with the new VULKAN 1.1 but the installation is not correct because it does not find compatible hardware but windows10 recognizes the 680mx gtx. Are there any updates on this? I would like to install XPLANE11.50 which has VULKAN support. Thanks a lot.