Wi-Fi problems were one of the biggest complaints about Apple’s Yosemite update for Mac last year, with thousands of users taking to Apple’s support forums to air frustration. Ever since upgrading to yosemite, discoveryd goes to 100% cpu and dns requests fail. What new nightmare is this?! pic.twitter.com/ErYAtAsAbM — Michael Koziarski (@nzkoz) October 17, 2014 If you’re wondering exactly what happ