WB selector - Eyedropper icon missing.

Just watched the "New effects for old-school looks" tutorial that Creative Cloud sent me. I followed along on a Mac - discovered that under Lumetri Color > White Balance, I do not have the WB Selector eye dropper icon like the instructor. I hope this isn't a bonus item for PC users.

Anyone know how to make this appear? Seems like a great feature that I would use on occasion.

Thanks!