Install Homebrew

You'll want Homebrew installed for both arm64 and x86 (rosetta) architectures, so that you can run ruby and other things in both environments, when needed.

Install Homebrew on arch64

1. Before opening terminal, get info on the Terminal app (finder > applications > utilities > terminal > get info) and uncheck Rosetta mode.

2. Open terminal

3. See instructions from homebrew's site

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

1. Now run brew -v and you should see the current version number.

2. You can also confirm that homebrew is now installed at this location:

Macitosh HD > opt > homebrew

Install Homebrew on x86

1. Before opening terminal, get info on the Terminal app (finder > applications > utilities > terminal > get info) and CHECK Rosetta mode.

2. Open terminal

3. See instructions from homebrew's site

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

1. Now run brew -v and you should see the current version number.

2. You can also confirm that homebrew is now installed at this location:

Macitosh HD > usr > local> bin > brew