If you run into this error: autoreconf: failed to run aclocal: No such file or directory, run brew install autoconf && brew install automake. And run the command from step 3 again.Installing the Protobuf Compiler on a Mac1K13Erika DikeNevio VesićFollowSep 4, 2018 · 1 min readbrew install autoconf && brew install automake && brew install libtool