Prerequisites

Make sure you have Homebrew:

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/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Follow Saurabh Bajaj’s Homebrew setup guide for a complete Mac dev environment setup.

Add Homebrew to your path by adding this to ~/.zshrc and ~/.bash_profile:

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PATH="/usr/local/bin:$PATH"

Install Protobuf from Source

Restart your terminal instance and run:

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git clone https://github.com/protocolbuffers/protobuf.git
cd protobuf
brew install autoconf automake libtool
autoreconf -i
./configure --prefix=/opt/usr/local
make
make install

Final Configuration

Add this to your ~/.zshrc too:

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PATH=/opt/usr/local/bin:$PATH

Restart your terminal and verify the installation with protoc --version.