Emacs 27.2 is drawing nearer with the release of the first pretest, Emacs 27.1.90. Eli Zaretskii made the announcement on the emacs-devel list. If living a bit on the edge doesn’t bother you, Eli and the rest of the developers would be grateful for your help in testing.
A lot of folks like to download binaries but building Emacs really is simple even on macOS. Download the source and follow the instructions in the INSTALL file. See Eli’s emacs-devel post for where to get the tarball.