Error Installing Homebrew - Brew Command Not Found

Fixing zsh command not found: brew? (installing Homebrew)

The bash deprecation warning from macOS can safely be ignored, or you can add export BASH_SILENCE_DEPRECATION_WARNING=1 to ~/.bashrc` to permanently silence it.

The initial brew setup script you're using was deprecated, you'll want to use /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)". I've skimmed that script and I think it's actually zsh compatible too, but not 100% sure. This will set it up to be accessible by any shells, as long as you have /usr/local/bin in your PATH. (export PATH="/usr/local/bin:$PATH" in your ~/.zshrc, or path+=/usr/local/bin to use the zsh-specific syntax).

If you run which zsh you should still see some output; if your default shell did get changed some, you can change it back using chsh -s /bin/zsh.

EDIT:

I missed that you said you have an M1 Mac. According to the install script, the brew prefix is /opt/homebrew on ARM-based Macs (apparently this is to work around needing sudo for operations in /usr/local). I don't have a new Mac to test with, but adding path+=/opt/homebrew/bin to a new file at ~/.zshrc should to the trick.

Installing Homebrew on macOS

It's on the top of the Homebrew homepage.

From a Terminal prompt:

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

The command brew install wget is an example of how to use Homebrew to install another application (in this case, wget) after brew is already installed.

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Historic...

Before about 2020, the command given on the Homebrew page was:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Error Installing Homebrew - Brew Command Not Found

The warning is telling you what is wrong. The problem is that brew is kept in /usr/local/bin

So, you can try /usr/local/bin/brew doctor

To fix it permanently alter your bash profile (.bashrc or .profile in your home directory) and add the following line:

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

How do I install homebrew on macOS? Error: -bash: $: command not found

You're copying the leading $, which is the prompt, not part of the command. It is to indicate "this is something you should paste on the commandline." The actual command is:

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

If you click the "clipboard" icon at brew.sh, it'll copy the correct command to your clipboard.

Note that this "leading $ prompt" indicator is used throughout the brew.sh site (and is very common in unix-style documentation). So when you see $ brew install wget, that means to type "brew install wget" at the command prompt. It does not mean to type $.

How to Install Homebrew on Windows WSL Ubuntu, and fix zsh: brew command not found error

In a wsl environment, brew is installed at location: /home/linuxbrew/.linuxbrew/ which is not part of the path.

So we simply need to add that to path, and it works. I am using zsh as my shell, so I add these lines to my ~/.zshrc file (in ubuntu file system) :

export BREW_HOME="/home/linuxbrew/.linuxbrew/bin"
export PATH="$PATH:$BREW_HOME"

Homebrew is not found on apple silicon

Run:

echo $SHELL

If your shell shown is zsh, do this:

echo "eval $(/opt/homebrew/bin/brew shellenv)" >> ~/.zprofile

If yor shell is bash, run this:

echo "eval $(/opt/homebrew/bin/brew shellenv)" >> ~/.bash_profile

If the result is csh, run this command:

/opt/homebrew/bin/brew shellenv >> ~/.cshrc

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