From the Tesla webpage with SuperCharger locations indicating the Mackinaw City location now has the Magic Dock Adaptor enabling non-Tesla vehicles to use it.
Via Plugshare report: A Bolt driver tried to charge at this Tesla location that has the magic docks and was unable to do so. Claimed the charger initiated the charge but quickly failed at two different chargers.
Yesterday we heard from Brown County officials: Meijer put in the request for the construction permit which is complete. EA has failed to submit a permit for utility testing of the site prior to turning on the power! Thus EA is performing terrible at this location.