NixOS vmware fushion config that non-root user can't move mouse cursor or click mouse buttons, but keyboard does work. With root mouse works fine.

configuration-issue-fixed.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, lib,	 ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  nixpkgs.config.allowUnfree = true;
  virtualisation.vmware.guest.enable = true;  
  # networking.hostName = "nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Set your time zone.
  # time.timeZone = "Europe/Amsterdam";
  time.timeZone = "America/Chicago";
  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
  # Per-interface useDHCP will be mandatory in the future, so this generated config
  # replicates the default behaviour.
  networking.useDHCP = false;
  networking.interfaces.ens33.useDHCP = true;

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
   console = {
     font = "Lat2-Terminus16";
     keyMap = "us";
   };

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  #services.xserver.displayManager.startx.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;
  

  # Configure keymap in X11
  # services.xserver.layout = "us";
  # services.xserver.xkbOptions = "eurosign:e";

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound.
  sound.enable = true;
  hardware.pulseaudio.enable = true;
    boot.kernelPackages = pkgs.linuxPackages_latest;
    boot.kernelPatches = lib.singleton {
    name = "enable-vmmouse";
    patch = null;
    extraConfig = ''
      MOUSE_PS2_VMMOUSE y
    '';
  };

  # Enable touchpad support (enabled default in most desktopManager).
  #services.xserver.libinput.enable = true;
  # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.bob = {
     isNormalUser = true;
     extraGroups = [ "wheel" "audio" "video" ]; # Enable ‘sudo’ for the user.
   };
   security.sudo.wheelNeedsPassword = false;
  # List packages installed in system profile. To search, run:
  # $ nix search w
         environment.systemPackages = with pkgs; [
  #   vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
           open-vm-tools
           open-vm-tools-headless
           wget
           firefox
           vim
           #xorg.xinput
           xorg.xf86inputvmmouse
           #xorg.xf86inputsynaptics
           #xorg.xf86inputmouse
           xorg.xhost
          ];
  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "unstable"; # Did you read the comment?

}

configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  nixpkgs.config.allowUnfree = true;
  virtualisation.vmware.guest.enable = true;  
  # networking.hostName = "nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Set your time zone.
  # time.timeZone = "Europe/Amsterdam";
  time.timeZone = "America/Chicago";
  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
  # Per-interface useDHCP will be mandatory in the future, so this generated config
  # replicates the default behaviour.
  networking.useDHCP = false;
  networking.interfaces.ens33.useDHCP = true;

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
   console = {
     font = "Lat2-Terminus16";
     keyMap = "us";
   };

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  #services.xserver.displayManager.startx.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;
  

  # Configure keymap in X11
  # services.xserver.layout = "us";
  # services.xserver.xkbOptions = "eurosign:e";

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound.
  sound.enable = true;
  hardware.pulseaudio.enable = true;

  # Enable touchpad support (enabled default in most desktopManager).
  #services.xserver.libinput.enable = true;
  # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.bob = {
     isNormalUser = true;
     extraGroups = [ "wheel" "audio" "video" ]; # Enable ‘sudo’ for the user.
   };
   security.sudo.wheelNeedsPassword = false;
  # List packages installed in system profile. To search, run:
  # $ nix search w
         environment.systemPackages = with pkgs; [
  #   vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
           open-vm-tools
           open-vm-tools-headless
           wget
           firefox
           vim
           #xorg.xinput
           #xorg.xf86inputvmmouse
           #xorg.xf86inputsynaptics
           #xorg.xf86inputmouse
           xorg.xhost
          ];
  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "unstable"; # Did you read the comment?

}

Thanks to the awesome NixOS community someone fixed this and pointed me in the right direction and I got this to work(run VMWare Fushion on MacOS with NixOS VM and have the mouse work for non-root user when running Xorg Windows Manager).

Things to note in the fixed config.

1. Add lib to https://gist.github.com/bobhenkel/fdd87fe38a60a38e8367722ac88db70d#file-configuration-issue-fixed-nix-L5
2. Add lines https://gist.github.com/bobhenkel/fdd87fe38a60a38e8367722ac88db70d#file-configuration-issue-fixed-nix-L59 to https://gist.github.com/bobhenkel/fdd87fe38a60a38e8367722ac88db70d#file-configuration-issue-fixed-nix-L60
3. nix-rebuild switch
4. reboot
5. login with non-root user and select a desktop manager that is Xorg like Gnome Xorg.
6. Mouse should now work!