There has been a steady stream of reports from users whose Wi-Fi connections were affected after installing the latest version of Mac OS X Complaints that Mac OS X Yosemite disrupts or entirely disables Wi-Fi have been flowing into social media sites and discussion forums since the release of the OS last Thursday, but Apple has yet to acknowledge there's a problem. There are multiple active threads on the topic in the official Apple Support forum, as well as in third party discussion boards , where frustrated users are furiously trying to troubleshoot the problem.