The following are some known issues running the Project Paradise Demo version on Mac OS Big Sur (Version 11). If you're having a different problem with your demo copy on Big Sur, please post here.
ISSUE: When attempting to start progam, a system error is triggered: “You do not have permission to open the application”. This is a common issue with many programs attempting to run on Big Sur. You can read more on Apple's official support page here.
SOLUTION 1: First, confirm that permission settings for the game are correct. To do this, right click on the game program and select “Get Info”. At the bottom of this window, make sure that next to your user name you have the “Privilege” option set to “Read & Write”. Then, try right clicking the application and then selecting "Open".
SOLUTION 2: If that still doesn't work, open up Mac's Terminal program (Applications > Utilities > Terminal). Enter the following text exactly as you see it here:
sudo chmod -R 777
Once this text is entered exactly as above (with a single space at the end), drag and drop the Project Paradise Demo program from wherever you have it stored on your computer into the Terminal program. (This will add the file path of the game and manually give your computer the permission to open it)
Next, hit enter. You will be prompted for your user password. Once entered, this will give you permission to open the file.
SOLUTION 3: If you're still getting the permissions error, try updating your version of Big Sur. Do this by clicking the Apple icon at the top left of your screen, then clicking "About this Mac". In the box that appears, click on "Software Update..."
ISSUE: When trying to launch the game, an system error appears: "Project Paradise Demo" cannot be opened because the developer cannot be verified."