A policy has a user justification pop-up response rule. This works reliably for Windows Agents; however, MacOS Agents do not get the pop-up.
DLP 16.0.x and 16.1
Currently, there is a workaround:
On Enforce, Make sure that in the Response Rule, If the Allow user to enter text explanation is CHECKED, then the Allow user to choose explanation is CHECKED also.
A hotfix for this issue is expected to be released for DLP 16.1