Downloading Whiteout 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Severeal. The application lies within Games, more precisely Adventure. We recommend checking the downloaded files with any free antivirus.
From the developer:
Whiteout is a minimalistic visual novel made in Ren'py engine. To advance through the game, left-click or press the space or enter keys. When at a menu, left-click to make a choice, or use the arrow keys to select a choice and enter to activate it. The game has one "true" ending and two bad endings.
You may want to check out more Mac applications, such as White Out, which might be similar to Whiteout.