Thanks to the awesome Stardew Valley community members, there is now an App Wrapper that allows you to play the game on a Mac, without the need to install a virtual machine or dual boot.
I've had a bit of difficulty getting all the right pre-requisites installed before installing the actual game, so I made this step-by-step video tutorial on the whole procedure:
How to run Stardew Valley on a Mac:
Here is the link to the post mentioned in the video:
http://community.playstarbound.com/threads/wineskin-wrapper-for-mac.108737/
Big thanks to @DandoCalrissian, @MonokelPinguin, @jeregrine, @haxd, @huecester, and the fellow players who helped making the App Wrapper.
I hope it will be useful to someone to make everything up and running, and be playing Stardew Valley in no time.
Important: Always make a backup of your save games before installing any version.
As always, you're doing this procedure at your own risk.