Congruence is Untested on macOS
Congruence has not yet been tested on macOS.
About Congruence
You are given two pairs of pentominoes

Combine them into two shapes that have the same outline
For an extra challenge, there's an option to hide the outline until you find it

macOS Game Tests
Congruence tested on macOS.
Congruence is not natively supported on macOS. See below for potential ways you can play it that have been tested.
Congruence hasn't been tested yet on macOS.