The 1.0 version of Warplanes WW1 Sky Aces for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Games. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac app is a product of Home Net Games.
From the developer:
Warplanes: WW1 Sky Aces lets you pilot warplanes during WW1 and become a hero of the skies. The game will take you into the times when aviation was in its dawning of existence. In Warplanes: WW1 Sky Aces you take control of over 30 historical airplanes. All planes can be customized and upgraded.
You can choose to pilot fighters and bombers so you can protect or destroy ground targets.
You may want to check out more software for Mac, such as Aced.com, Sky Sports or Sky Cinema, which might be similar to Warplanes WW1 Sky Aces.