Download of Monorail 1.2.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version among Monorail for Mac users is 1.2. Monorail for Mac belongs to Games.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free software for Mac is IBA Puzzles. This program's bundle is identified as com.yourcompany.yourgame.
From the developer:
Monorail is a new logic puzzle for touch screens. Monorail is challenging and fun like sudoku, and entirely visual/spacial/geometric. There are no numbers or symbols. You solve puzzles by drawing rails to create a working monorail system. The object of each puzzle is to create a single loop (closed path) of rails connecting all stations so the monorail can circle around endlessly.
You may want to check out more Mac applications, such as Train Titans, which might be similar to Monorail.