NBS settings options have changed in 8.6 RU1. Is DS support for Mac OS still available?
Starting with 8.6 RU1, Deployment Solution features are no longer supported on Mac OS clients.
Please refer to 8.6 RU1 release notes:
https://techdocs.broadcom.com/us/en/symantec-security-software/endpoint-security-and-management/it-management-suite/ITMS/Release-Notes/IT-Management-Suite-86-RU1-Release-Notes/Whats-New-in-This-Release-ITMS-86-RU1.html