Here is the link to the Protocol Buffers / Protobuf Github
https://github.com/protocolbuffers/protobuf
Should I follow the C++ installation instructions?
There is no pre-built binary for Mac M1 ARM architecture.
"Protocol Compiler Installation
The protocol compiler is written in C++. If you are using C++, please follow the C++ Installation Instructions to install protoc along with the C++ runtime.
For non-C++ users, the simplest way to install the protocol compiler is to download a pre-built binary from our release page:
https://github.com/protocolbuffers/protobuf/releases
In the downloads section of each release, you can find pre-built binaries in zip packages: protoc-$VERSION-$PLATFORM.zip. It contains the protoc binary as well as a set of standard .proto files distributed along with protobuf."
As of July 2nd, the estimate delivery time for the Mac M1 ARM binary is 4 months.