Why can't I SetActive children of this canvas on Mac?

Xpost from my forum post which hasn't been responded to yet:

Attached is a picture of the behavior in question. So on my PC, where I do most of my development, the game objects parented to the canvas are active. When I pulled my latest update from Unity Collaborate, the Scene loads with them deactivated and I cannot click the checkbox that sets them to active. This is the UI for my game, so I am unable to test on a mobile device since the controls aren't visible. Since it is working fine on my Desktop, I'm really confused as to why, even after reverting changes on the scene, it loads with the objects disabled. shrugs