Step 1: Plug printer into computer by USB
Now this is done, open system preferences on your mac.
Now go onto the printers & scanners section of the settings where it will open a screen like below:
Click on the + sign in the bottom left corner
Add the desired printer from the selection,
Now it's added go to print a page,
Click more settings under layout
Scroll down until you see print using system dialogue
Click into system dialogue
Now copy the settings below
Once copied, click onto presets and save this as a preset name, this is now how you would print A4.