My son has been playing a lot of Minecraft and runs a server so I made him a series of utilities to make life easier. The first few I wrote were in Python and Tk, quick and dirty, but I wanted to learn the Swift programming language so I rewrote one utility in XCode 6 with Swift. What it does is moves worlds from the Minecraft saves folder to the server and updates the server.properties file. It’s just a simple little tool, but it saves him time as he switches between new worlds a lot. If this is something that interests you, you’re welcome to download it and use it. I consider this a public domain application so do with it as you wish. It’s tested on Yosemite.