The installer is properly signed by Blizzard and launches Battle.net -- an app that centralizes all of the player's Blizzard games into one place -- with Overwatch appearing in the "Games" tab. Redditor Heyoni shared a few images of Overwatch appearing in Battle.net on their Mac, but as of now the game is not able to launch and delivers an error message when "Play" is clicked.
The Reddit thread discussing the news theorized the potential for this being a bug, or that it could be a hint for an upcoming announcement related to Overwatch's debut on Mac. Blizzard just wrapped up its annual BlizzCon event, in which it unveiled a new support class for Overwatch named Moira, a new map called Blizzard World, and a new character cinematic focusing on Reinhardt. During the event, no news was given regarding Overwatch expanding to Macs.
Unfortunately, a comment made by an Overwatch engineer in a new interview suggests Blizzard is still not planning on launching the game for Mac anytime soon. Tim Ford, the lead software engineer for gameplay systems on Overwatch, told Gadgets 360 that Blizzard has "no plans" of launching Overwatch on Mac. Ford said this is due to "several technology decisions" Apple has made on Macs, which make it "a little difficult" for Blizzard to create a Mac version of the game.
With Overwatch being available on the PS4, Xbox One, and Windows PC, it’s one of the rare Blizzard games that’s not on the Mac. It's odd considering that every other Blizzard title has graced Apple’s line of computers. Ford explained why Overwatch will not be making it to the Mac.Before Overwatch launched in May 2016, Blizzard said a Mac version was not a priority because it was "just too challenging" at that point to support Apple's platform, due to the "technology behind Macs." Then, in May 2017, Blizzard vice president Jeff Kaplan said the company is keeping an "open mind" about bringing Overwatch to Mac gamers, it just needs the "priorities of our development process to line up with the capabilities of the platform."
“We have no plans of giving this game on the Mac," says Ford. "There are several technology decisions that Apple has made that has made it a little difficult for us to release Overwatch in the way we want it to be consumed, and that is why we haven't pursued it."
As news of the Mac installer spread online, Polygon reached out to a Blizzard representative, who stated that the Overwatch development team has "nothing to announce at this time" regarding a Mac launch for the game. For now, Overwatch is available to play on Windows PCs, PlayStation 4, and Xbox One.