I have some issues with trying to get eOS to work on a mac 7.1. I've tried with nvidia-340 as it was recommended to a geforce 320m, but xorg won't start unless it's from recovery mode where it works fine but with software rendering hogging down the performance. Read somewhere that it might be a problem between grub and efi to recognize some bus for the gpu-card.
Here is some output (sorry for some swedish output, the system is for a relative)
lshw -c video *-display UNCLAIMED beskrivning: VGA compatible controller produkt: MCP89 [GeForce 320M] tillverkare: NVIDIA Corporation physical id: 0 bus info: pci@0000:02:00.0 version: a2 bredd: 64 bits klocka: 33MHz förmågor: pm msi vga_controller bus_master cap_list konfiguration: latency=0 resurser: memory:92000000-92ffffff memory:80000000-8fffffff memory:90000000-91ffffff ioport:1000(storlek=128) memory:c0000-dffff
Errors in /var/log/Xorg.0.log
[ 1180.130] (EE) [drm] Failed to open DRM device for pci:0000:02:00.0: -19 [ 1180.130] (EE) open /dev/dri/card0: No such file or directory [ 1180.130] (EE) open /dev/dri/card0: No such file or directory [ 1180.130] (EE) Screen 0 deleted because of no matching config section. [ 1180.173] (EE) AIGLX: reverting to software rendering