Hello! I understand that the silent mode option in your O-KAM Pro app is not turning on properly on your Macintosh with OS X 10.15.7. To help you better, could you please clarify if the silent mode you mentioned is related to the app notifications being muted, or is it about the app controlling the silent mode on your Mac? Also, are you experiencing this issue only within the O-KAM Pro app or with other notifications on your device as well?

Meanwhile, here’s a basic troubleshooting approach for silent mode issues in the O-KAM Pro app:

1. Check Notification Permissions
On your Mac, go to System Preferences > Notifications, find O-KAM Pro in the list, and confirm that notifications are allowed. Also, check if the app has permission to mute alerts or sounds.

2. App Settings
Open the O-KAM Pro app and look for notification or sound settings inside the app menus. Make sure silent mode or mute/silence notifications is enabled if available.

3. Update the App
Ensure you have the latest version of O-KAM Pro installed from the App Store. Older versions might have bugs affecting features like silent mode.

4. Restart the App and Device
Quit the O-KAM Pro app entirely and reopen it. Also, reboot your Mac to clear temporary glitches.

5. Reinstall the App
If the issue persists, try uninstalling and reinstalling the app. This can resolve corrupted settings or files.

If these steps don’t resolve your problem or if you meant something different by “silent mode,” please let me know. I’ll then guide you with more specific and advanced steps to fix it. Are you satisfied with this initial approach?