I strongly suspect this is an X module problem but please correct me if I'm wrong. I have an imac A1419, late 2012.
Whether I use startx or lightdm I cannot access the virtual terminals, just dark blank screens. I can return to X session with Ctl-Alt-F9. Also I have no Shutdown button, only Logout which gives me a dark blank screen and I have to power off the hardware (Icould probably shutdown with SSH or switch to root in terminal). Otherwise X works flawlessly.
Is this a known problem with Nvidia? I have not customized this install only added pkgs.

/( )` ---------------------
\ \___ / | OS: GhostBSD 23.03.17 amd64
/- _ `-/ ' Kernel: 13.1-STABLE
(/\/ \ \ /\ Uptime: 3 mins
/ / | ` \ Packages: 1024 (pkg)
O O ) / | Shell: bash 5.2.15
`-^--'`< ' Resolution: 2560x1440
(_.) _ ) / DE: MATE 1.26.0
`.___/` / WM: Metacity (Marco)
`-----' / Theme: Vimix [GTK2/3]
<----. __ / __ \ Icons: Qogir [GTK2/3]
<----|====O)))==) \) /====| Terminal: mate-terminal
<----' `--' `.__,' \ Terminal Font: Droid Sans Mono 10
| | CPU: Intel i5-3470S (4) @ 2.893GHz
\ / /\ GPU: GK107M [GeForce GTX 660M Mac Edition]
______( (_ / \______/ Memory: 2157MiB / 32655MiB
,' ,-----' |
`--{__________)


Here are the modules that load:
$ grep LoadModule /var/log/Xorg.0.log
[ 103.704] (II) LoadModule: "glx"
[ 103.739] (II) LoadModule: "glxservernvidia"
[ 103.739] (II) LoadModule: "nvidia"
[ 103.755] (II) LoadModule: "fb"
[ 103.755] (II) LoadModule: "wfb"
[ 103.759] (II) LoadModule: "ramdac"
[ 103.759] (II) LoadModule: "glxserver_nvidia"
[ 105.779] (II) LoadModule: "dri2"
[ 105.913] (II) LoadModule: "libinput"

Hi jonsoons,
is this the initial install of have you run an update of ghostbsd? When you run an update you should have a former BE (BootEnvironment) and can step back to lock at the changes.
run bectl list and you may see an alternative BE to boot from.
Regards Arnold

Still running the original install BE:

[root@ghostbsd-mac ~]# bectl list
BE Active Mountpoint Space Created
backup-2023-03-20-09-16 - - 4.98G 2023-03-20 09:16
default NR / 20.5G 2023-03-14 16:57

Hi,
before installing ghostbsd, when booting into the live version, do you have seen a working gui/desktop?
Then my approach would be, check which nvidia is installed:
pkg list | grep nvidia-driver
and then go to nvidia webpage to check which driver version should be used for your graphics adapter:
https://www.nvidia.com/download/index.aspx?lang=en-us
Maybe it helps,
good luck.
Ciao Arnold

Thanks Arnold. I downloaded the tarball for the GTX 660 (my GPU is 660M Mac Edition, should be close enough). I'm a little annoyed there is no README. Should I remove all other nvidia drivers so as not to confuse the X auto-configurator? I will compile and report back.
Jonathan

What do I do about these lines in my make:

find: /compat/linux/lib: No such file or directory
find: /compat/linux/usr/lib: No such file or directory
find: /compat/linux/usr/X11R6/lib: No such file or directory
find: /compat/linux/lib: No such file or directory
find: /compat/linux/usr/lib: No such file or directory
find: /compat/linux/usr/X11R6/lib: No such file or directory
find: /compat/linux/lib: No such file or directory
find: /compat/linux/usr/lib: No such file or directory
find: /compat/linux/usr/X11R6/lib: No such file or directory

Jonathan

Correction The Log Out button is a function of startx. If I enable lightdm the Shutdown button comes back.