Got the Shakes
Member
This will be official (ie. likely better supported, without any need of any work arounds), free and coming to OS X.
Who knows if they would have bothered, it's always their prerogative to do so. Considering the the homebrewed app isn't even released yet I don't see why it matters.
The home brewed app launched yesterday about 12 hours before Anyone from Sony made this announcement. I should say that soft launched as the dev only let 50 copies out because his download server couldn't handle the load. I know we haven't seen the Sony version yet, but for people who care the biggest advantage to the home brew one is that you can use anything that uses Xinput to control your PS4 games. So keyboard and mouse or Xbox controllers work fine, as well as Dualshocks with some tinkering.