Cross-highlight on multiple visuals... on a Mac?!

We were very excited about the February Feature that allows users to cross-highlight items between multiple visuals.

How does this work for a Mac user? (Previously, you could use Control-Double-Click to select multiple items in the same visual - but this doesn't seem to work since the February update, and we can't see how to replicate the functionality on the Mac.)

I'd really love to tell all my users about this exciting new functionality, but I need to know if I shouldn't be telling my Mac users about it...!