To Hack McKay’s Computers on the second floor in Tourist Trap in Far Cry 6, climb the ladder to the second floor on the north east side of McKay Global Offices.
Make your way to the east side of McKay Global Offices to find the computer to hack on the second floor and interact with it.
Go back out the way you came and go back down to the first level. Make your way all the way around McKay Global Offices to the south side.
Go through the door and make your way along the south wall until you find the computer to hack on the first floor and interact with the computer.