A tool that searches Appstore for missing macOSes.
Every year when a new macOS is released, the older ones get missing in Appstore. Making the Appstore's search button completely useless!
For example, if you are searching for Sierra or El Capitan now, you may NEVER find it anymore using the search button.
As a result, this tool was developed to resolve that issue. Here's an app that communicates with Appstore and allows you to download your desired vanilla macOS (even the older ones).