I am running a Gigabyte RX460 4G GPU in my studio's trusty 4,1>5,1 hex Mac Pro. After having to use SwitchResX to get 60Hz 4k via Display Port to HDMI active adaptor when running early versions of Sierra, when testing 10.12.6 from another boot drive that had not been modified by SwitchResX I found that 60Hz 4k was supported natively from the RX460 DP output. So all is well at the present, but what does the near future hold in store? My concern stems from reports I have seen suggesting High Sierra is not working properly with RX460 GPUs. I would appreciate i greatly if folks who have tested an RX460 with High Sierra let us all know what they have encountered. If possible, please specify HS OS (Beta) version and the version of the RX460 tested. Thanks!