The layout was created using ukelele tool. It is based off US keyboard layout but the Alt button was slightly changed to fit no dead key layout, for the most part at least.
Copy the keylayout file onto /Libary/Keyboard\ Layout folder and reboot your
mac.
sudo cp Us\ intl\ altgr\ no\ dead\ key.bundle/Contents/Resources/Us\ no\ dead\ key.keylayout /Library/Keyboard\ Layouts/