Grant passed today, thank you all who took time to participate and vote for this proposal!
I’ve also made some progress with learning about gitian, it turns out you can build macosx compatible binaries on linux using cross compilation tools! I’ve successfully built most up to date bitcoin qt client and it works, it is deterministic and signatures of result match everywhere provided inputs are the same.
Some serious refactoring of gitian descriptors would have to take place to be manageable, but in the end we would be able to use same build infrastructure for generation of windows, linux and macosx clients.