Separate names with a comma.
I'm in a similar boat - D2 is an all time favorite, so I was really hoping Parallels would let me play it. Still, it is a beta, and there may be...
Just tried it on my M1 iMac, with 16 GB RAM (8GB assigned to Parallels) and got the same error. It seems Blizzard just doesn't want it to work. I...