How to play Divinity II: Flames of Vengeance on Mac

Divinity II: Flames of Vengeance is an add-on for Divinity II: Ego Draconis and starts right where the cliffhanger of the main game left off. The protagonist has been imprisoned in a crystal alive and at full conscience, seemingly forever. Meanwhile, the sorceress Ygerna and her beloved Damian, the adoptive son of Lucian the Divine, have become stronger than ever thanks to the hero reuniting them. The protagonist has to idly sit by only having the Divine keeping him company. Or at least it seemed that way until Behrlin, a ghost, shows up and offers the hero a deal: Go to Aleroth, which is under heavy attack by Ygerna's and Damian's forces, and only a force-field put up by the wizard Zandalor keeps everything from falling apart. There the protagonist has to free Behrlin's body, which has been imprisoned for centuries in the caverns deep under the city. In return, Behrlin promises to revive the Divine to finally do what the hero couldn't: destroy Ygerna and Damian for good.