I was gifted a 2013 vintage iMac with a "Fusion" drive whose SSD was failing.
Since it has a nice screen, I was using Apple's VNC client when I wanted a GUI on my head-challenged Fedora systems (currently one on F35 and one F36).   When the SSD died, I installed
F35 on an external USB drive.  Gnome Connections was working well, so I installed F36 on the internal hard disk.  That seemed to go well, but Connections is only showing the top half of the VNC screens for both servers. 

lshw says:

*-display
                description: VGA compatible controller
                product: GK107M [GeForce GT 755M Mac Edition]
                vendor: NVIDIA Corporation
                physical id: 0
                bus info: pci@0000:01:00.0
                version: a1
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
                configuration: driver=nouveau latency=0

I tried novnc_proxy and that is working properly, but I wanted to ask if others have seen this.  I'm reluctant to try a non-free driver unless I encounter a problem with novnc_proxy or a spell of weather that keeps me indoors (next winter?).

--
George N. White III