MAC Storage is a generic UNSC term for either of the two areas on an Orbital Defense Platform, between the armories and Firing Control where MAC rounds are stored.

Cairo Station MAC Storage Edit

Cairo Station MAC Storage refers to the area below Armory A-01 where MAC rounds are stored. During the Battle of Earth, John-117 went through MAC Storage to get to the Armory, where he avenged the unnamed Master Gunnery Sergeant's (Master Gunns) death before moving on to Commons B-01.