Apple releases OS X 10.10.1 with Wi-Fi reliability fixes and more
Apple has released the latest update for OS X Yosemite, version 10.10.1. It contains a number of fixes and improvements to Yosemite You can find OS X 10.10.1 in the Updates section of the Mac App Store.
This update fixes Wi-Fi issues with Yosemite, as well as connections with Microsoft Exchange servers.