Minecraft wiki entry for Create_a_Mac_OS_X_startup_daemon, associated text: It's quite easy to start up regular backups. By extension, adding a backup launchd.plist and command file is nearly a no-brainer. The following code will execute every hour, only when Minecraft is actually running, will stop the save, wait for the console to show saving was done, and start it back after you're done backing it up.