Thank you OOPer! As of now, this API is working in BigSur. So, perhpas...we are talking about 6 months lead time. Since this API is pivotal for server communication for the client server application, converting to cocoa using Objective C in C++ codebase is a little tricky and we want to make sure that we are covered on all fronts. However, Apple may have its own reasons not to pre-announce the date of removal.