I am in the midst of updating the soundhack PD externals. So far, macOS binaries have been compiled as Universal 32/64 bit; and source code for the externals has been uploaded. As soon as I get to a Windows machine (or someone helps me out), I will update those for 64 bit as well.
Find them in the bottom left side of this page: http://www.soundhack.com/freeware/
Tom