should say in the title that this is from 2016.
Apple never instituted the Mac bug bounty, but is rumored to be doing so later this week:
Apple Hands Hackers Secret iPhones In A Bid To Boost Security, Sources Say https://www.forbes.com/sites/thomasbrewster/2019/08/05/apple...
"It'll also be announcing an Apple Mac bounty, so anyone who can find security issues in macOS will get rewarded, sources claimed."