Hide apps from Mac App Store purchased list
Remove apps from view in your purchased list in the Mac App Store
Here's how you can hide apps in your Mac App Store purchased list.
1. Open the Mac App Store.
2. Go to your Purchases list by clicking the Purchases icon.
3. Control-click or right-click the app you want to hide.
4. Choose the Hide Purchase option.
For more, see the original article at the link below.