First, a reminder that I'm not a zcashco employee, but an independent developer, working on this stuff full time, and please help this effort with donations in BTC to: 1AsoFtYfV2mCpCS98Qf3ytKs8y9VSzZ4V5
I just merged the rc2 changes into my mac port. On rc1 we got all dependencies, including the ever fussy libsnark, to build, along with most of the main zcash source. I'm doing the first test build with the rc2 changes merged in right now as I type. GNU autoconf is still adding in include files a bit too aggressively, and I'll be continuing to tune that. The deterministic build system zcashco is using for their linux builds has helped a lot so far in figuring out things to exclude on the mac. A full zcashd binary isn't there yet, but we're getting close.
On the Windows side of the house, I've successfully added a completely new native Windows builder to the dependency system zcash inherited from bitcoin (using mingw64 for the curious), which I intend to contribute back upstream to bitcoin to ease native, non-cross compiled builds of bitcoin (they build their Windows releases on linux, and native 64 bit Windows builds are still...problematic). I'll be merging in the rc2 changes later today and seeing how a build goes.