- Sep 19, 2011
- XPS 13 9360
- UHD 620
Quick question: do you have issues with HDMI over USBC? I can' find a way to output 4k 60fps, but I'm not sure where the limitation is. SwitchResX doesn't list it as available (max I can find is 1080p60Hz). The adapter is the official apple one and the cable is HDMI 2.1, so this should not be an hardware problem. I've noticed that this product page states that the only MacBook Pro capable of 4K60 through USBC is MacBook Pro (13-inch, four Thunderbolt 3 ports, 2020). Is there an SMBIOS limitation on USBC output?
Probably. Try experimenting with MacbookPro16,3 as it's the closest (and most modern).
At some point there will be a proper override setting for fbmem but for now (until someone dumps that SMBIOS) it will be hit and miss.