Step

  1. Install Homebrew

  2. Install GCC ARM Toolchain

    brew tap PX4/homebrew-px4
brew update
brew install gcc-arm-none-eabi-48

  3. Profit!

Issue

  • 48 may no longer works try 49 -or-
  • brew install gcc-arm-none-eabi

Misc

Someone mentions below method. NOT VERIFIED.

brew cask install gcc-arm-embedded

Reference