A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
I had a lot of the issues mentioned in the comments here as well: "ArgumentException: Value does not fall within the expected range." and a...
I had the same problem. Seems strange that every other build support follows the naming schema of "x Build Support" except for the Mac one.