If you need to download any previously purchased apps (that may no longer be on sale) from the App Store, follow this simple guide below:
- Launch the Mac App Store
- Go to the "Purchased" tab
- Scroll through the list of purchased items (unfortunately Apple doesn't have a search function for this tab).
- Once you've found the app you want to install, press the "Install" button on the right-hand side of the list.
- That's it, you're done!