- Official Post
GrandToledo: Unfortunately Mac App Store issues are out of our control. The following way has fixed the issue for some customers with a similar issue:
- Delete the app from your Mac via the Launchpad app. (In our experience, deleting is more effective than merely dragging it to the Trash or by other methods.) Within the Launchpad, click and hold on the app icon, then click the black “X” icon that appears.
- Log out of the Mac App Store (from the menu bar, choose Store > Sign Out).
- Reboot your Mac.
- Log back in to the App Store (Store > Sign In), then switch to the Purchases tab and click the Install button next to the app name to reinstall.