@Etresoft [quote='815156022, Etresoft, /thread/768782?answerId=815156022#815156022, /profile/Etresoft'] I'm not sure what you mean by "build agent". [/quote] We are providing software running on macOS to our customers (we are in B2B business) and need to support older macOS versions and all the versions up to the current one. So we must be able to build for the old versions in case we need a bugfix. Currently we have several build environments (aka build agents) and are going to organize them better according to our needs. And for that we need a clear statement/documentation from Apple. I'm going to accept your answer to my question since you helped me much more than DTS Engineer (which is actually disappointing...) Thank you so much!