The 1.12.2 version of Minecraft Server 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. The software lies within Games, more precisely Tools.
The unique identifier for this app's bundle is net.minecraft.server.MinecraftServer. This free software for Mac OS X was originally developed by Mojang. We recommend checking the downloaded files with any free antivirus. The following versions: 1.3 and 0.2 are the most frequently downloaded ones by the program users. This free application was developed to work on Mac OS X 10.5 or later.
From the developer:
Minecraft Server provides an easy way to set up a Minecraft Multiplayer Server on a Mac. The idea came from the Windows "Minecraft Server.exe"
The configuration files are stored in the same directory as the server. However you will still have to set up either port forwarding or Hamachi (for Hamachi servers).
You may want to check out more Mac applications, such as PS3 Media Server, Minecraft Jar Tool or Minecraft Downgrader, which might be similar to Minecraft Server.
Network Tools
Utilities