Partitioned my Mac to install windows and be able to play Mods, etc. total Cost around USD 15.

1. Download an IOS version of Windows here: https://www.microsoft.com/en-us/software-download/windows10ISO
2. Open Bootcamp in Utilities. follow instructions
3. When asked choose don't have license Key (does not matter)
4. download COD4 in steam (only expense)

To choose which system to boot with when restarting computer keep pressed the "option / alt" key which is to the left of command key.

full instructions at:

https://support.apple.com/en-us/HT201468

Issue I have had so far:

- without liscence have no access to customize profile example mouse settings
- Keyboard layout differ
- windows needs to be reboot once in a while.
- Steam takes over all your gamming profile
- when changing resolution ingame it messes up the resolution in windows.

rgds


Nightcap