PList, or property list, files are files which store serialized objects. On MacOS they are used for storing a user's settings information. Eg. if you set your dock to be on the left, bottom, or right. On the command line there is a `defaults` command by which you can inspect and update your options manually. It can be somewhat tedious. This program, written in Go, will output the command to make those changes in real time as you make changes in your system.