This problem began three weeks ago. Whenever I go to launch a game (Heroes of the Storm, Overwatch, WoW), the Play button grays out to Launching, but the games will not launch. I have done a complete system update; my drivers are up-to-date and on the list of recommended drivers for each game; and I have followed the official steps of uninstalling and reinstalling the BattleNet Launcher. Nothing has worked.
Operating System: OS X Yosemite 10.10.5
Graphics: Intel HD Graphics 5000