This tweak can be used to change the intensity of the font smoothing (anti-aliasing), either making the font’s smoother or to disable altogether.

To implement this tweak:

1. Start a new Terminal session (in Finder click Applications > Utilities > Terminal).
2. To set this to Strong, type (or copy and paste) the following command:

   defaults write NSGlobalDomain AppleFontSmoothing -integer 4

   To set this to Smoother, type (or copy and paste) the following command:

   defaults write NSGlobalDomain AppleFontSmoothing -integer 3

   To set this to Medium, type (or copy and paste) the following command:

   defaults write NSGlobalDomain AppleFontSmoothing -integer 2

   To set this to Minimal, type (or copy and paste) the following command:

   defaults write NSGlobalDomain AppleFontSmoothing -integer 1

   To set this to Disabled, type (or copy and paste) the following command:

   defaults write NSGlobalDomain AppleFontSmoothing -integer 0

3. To reset this setting to the default value, type (or copy and paste) the following command:

   defaults delete NSGlobalDomain AppleFontSmoothing

4. To activate this tweak please reboot the system.
5. Close the Terminal session by typing exit at the prompt.