The 2.15 version of PulsarChess for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. PulsarChess for Mac lies within Games, more precisely Board.
The actual developer of this free Mac application is Michael Ronald Adams. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Pulsar Chess Engine plays Chess with multiple levels and six Chess variants: Chess960, Crazyhouse, Loser's Chess, Atomic, Three Checks and Giveaway (also known as Suicide Chess). Pulsar has levels of play from beginner too advanced. The game button lets the user control the variant and difficulty. It defaults to Chess at Easy (lowest level) but remembers the current settings when the app restarts.
You may want to check out more software for Mac, such as PySol, Deluxe Free Cell or Blue Reversi, which might be similar to PulsarChess.