First, make sure that your disc drive has enough space to download & install your games, as this can be a cause for this particular issue.
If drive space isn't the issue, there are a few other things to try below.
Check the 'Applications Folder'
Many Mac users accidentally run games directly from their "Downloads" folder or a mounted Disk Image (.dmg). macOS is very strict about where apps are allowed to "write" data.
- Ensure the Big Fish Games Client and the game itself are dragged into the Applications folder. If they are already there, move them to the Trash and drag them back in from the installer to "reset" the container permissions.
Be Sure to Grant 'Full Disk Access'
Modern macOS versions (especially Monterey, Ventura, and Sonoma) require explicit permission for apps to modify files.
- Go to the Apple Menu > System Settings (or System Preferences).
- Navigate to Privacy & Security > Full Disk Access.
- Click the [+] icon and add the Big Fish Games Client.
- Ensure the toggle is set to ON.
Repair Permissions via Disk Utility
If the "insufficient permissions" error is system-wide, the file structure itself might be confused.
- Open Finder > Applications > Utilities > Disk Utility.
- Select your main hard drive (usually "Macintosh HD").
- Click First Aid at the top and select Run. This will verify and repair file permissions across the drive.
The 'Get Info' Manual Overwrite
If a specific game is being stubborn, you can force it to behave:
- Right-click the game icon in the Applications folder and select Get Info.
- At the bottom, look for Sharing & Permissions.
- Click the Lock icon and enter the Mac admin password.
- Change the "Privilege" for your username (and "everyone") to Read & Write.
- Click the "three dots" or "gear" icon and select Apply to enclosed items.