Fix for Mac users getting the error "CSD2.app is damaged and can’t be opened. You should move it to the Trash". Tested on latest version macOS Catalina 10.15.5.
Warning: only use this method if you are comfortable using Terminal.
1. Open Terminal.
2. Navigate to the directory the game is located. Example:
cd Downloads
3. Type the following and press enter.
xattr -cr CSD2.app
4. Run the game.