Don't Starve Together minimum requirements for Windows assume having at least Windows Vista/Windows 7/Windows 8 operating system. Your processor should be 1.7+ GHz or a more powerful one. The minimum RAM requirement is 1 GB. As for a graphics card, it should be Radeon HD5450 ; 256 MB or higher. You also have to have 750 MB free disk space to install the game.
As for Mac OS, Don't Starve Together requirements here start with Lion (OSX 10.7.X) operating system. Processor needs to be at least 2.0 GHz Intel. 4 GB of RAM is required. Your graphics card should be NVidia or ATI graphics card. Finally, the game needs 750 MB of free disk space.
Don't Starve Together Linux Requirements
Don't Starve Together system requirements for Linux