Real Racing 2 won't open

I just downloaded Real Racing 2 from the Mac App Store. It simply won't open. When I try to run the app the following error pops up:

Real Racing 2 can't be opened.

"Real Racing 2" is damaged and can't be opened. Delete "Real Racing 2" and download it again from the App Store.

This report will be sent to Apple automatically.

I have tried the following, none of which worked:

• Deleted and reinstalled the app 3 times.
• Rebooted my computer.
• Turned off WiFi when trying to start the game.
• Signed in and out of my App Store account (my Apple ID).

Any and all help is appreciated. If I am unable to get this game working, a refund is justified. Thank you.