Downloading Sudoku++ 120.0 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 software is included in Games. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is an intellectual property of VM Mobile Team.
From the developer:
Sudoku ++ is a classic Sudoku game for beginners and experts designed to help you relax while keeping your mind active. The application offers the same great experience of playing Sudoku with paper and pencil. There are millions of Sudoku puzzles of 4 difficulties: easy, medium, difficult and expert. You can play simpler levels to exercise your brain or try expert levels to make your mind work.
You may want to check out more software for Mac, such as Web Sudoku Deluxe, Sudoku Uno or Mister Sudoku, which might be related to Sudoku++.