A MAC Group is?

A MAC Group is a composed of senior officials, such as agency administrators, executives, or their designees, who are authorized to represent or commit resources and funds in support of incident activities.

This definition accurately reflects the role of a Multi-Agency Coordination (MAC) Group. These senior officials bring strategic leadership to emergency management by allocating resources, making policy decisions, and providing necessary support for incident response. Unlike operational teams or facilities, a MAC Group focuses on high-level coordination to ensure efficient resource distribution and effective interagency collaboration during complex incidents.

Source: https://training.fema.gov/emiweb/is/is800d/english/instructor%20guide/el0800.d%20ig.pdf