From the Kickstarter FAQ:
Right now, we're focusing on Windows only. Additional platforms may be announced in the future.
Believe us, it's not that we're not interested in producing a version for Mac/Linux/Console, it's just that we want to get the gameplay and world fleshed out in all the detail that it needs first. Once we have the game fully worked out, we'll start looking at porting it to other platforms. That’s not something that’ll happen during the Kickstarter or indeed this year.
But - and it’s an important but - we do have most things in place to support several other platforms, since we are starting work from the Divinity: Original Sin- Enhanced Edition engine. We just don’t want to make any promises yet.
