Big Sur - Disable iCloud Bookmarks

Information

The macOS built-in Safari.app bookmark synchronization via the iCloud service _MUST_ be disabled.

Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated bookmark synchronization _MUST_ be controlled by an organization approved service.

Solution

This is implemented by a Configuration Profile.

mobileconfig profile info:

com.apple.applicationaccess:
allowCloudBookmarks:
False

See Also

https://github.com/usnistgov/macos_security