Stevenson University and Hood College accepted invitations to join the MAC and MAC Commonwealth starting with the 2012–13, expanding the conference to 18 members. Elizabethtown College moved to the Landmark Conference for 2014–15. In May 2018, Manhattanville College announced that they would leave the MAC Freedom Conference and return to the Skyline Conference for the 2019–20 academic year. Manhattanville was a charter member of the Skyline before leaving to join the MAC in 2007. Three months later, the MAC announced that Stevens Institute of Technology, which had left the conference in 1978, would return in 2019–20 and replace Manhattanville in the MAC Freedom. In April 2019, the MAC announced that York College of Pennsylvania would join the MAC Commonwealth in 2020–21.