In order to successfully synchronize Safari bookmarks on the aforementioned OS with your other devices, SyncMate will need the full disk access. Here are the steps:

1. Open System Preferences on your Mac. Then open Security and Privacy section.

2. Switch to the Privacy tab and click the Full Disk Access folder in the list.

3. Click the lock. You have to unlock it to be able to make changes. Enter the administrator password.

4. Click the + button to manually add the file to the Full Disk Access list.