We released an update to Box Sync (v 4.0.8016). This release includes:
Support for Device Trust disk encryption requirement on macOS Big Sur - With this new update, users will be able to log in to Box Sync from a macOS Big Sur device if the disk encryption check requirement for Device Trust has been enabled. Device Trust enables customers to regulate Box access based on a device's security status. This ensures that only secure devices, such as those that are corporate managed or encrypted, can access Box.