I’m using Mojave and I need some help in disabling / greying out / putting a line through sold out variants, making them non-selectable. THIS is a article for the exact problem, but the solution does not work on Mojave. Any help would be much appreciated.
@joey293
Sorry you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community! 
Thanks for your good question.
Please share your site URL,
I will check out the issue and provide you a solution here.
This is my website. Thank you in advance!