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Setting up macOS

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Enable Rosetta for Terminal on M1 Mac

If Rosetta 2 is not installed by default in your M1 Mac, then open the pre-installed Terminal app and run the following command:

1/usr/sbin/softwareupdate --install-rosetta --agree-to-license

Rosetta allows us to use apps built for Mac with intel chip.

Several CLI tools do not have native versions built for the new M1 architecture.

Enabling them on your native M1 Mac terminal can be frustrating.

Follow these steps to enable Rosetta:

  • Select the app(Terminal) in the Finder. Note that the "Terminal app" could be at "Applications/Utilities".

  • Right click on the app(Terminal) and select Get Info.

  • In General, check the Open using Rosetta check-box.

  • Close the Terminal Info.

  • Now when you quit the terminal and open it again.

  • If you haven't installed Rosetta yet, then it would prompt you to install it.

  • If the popup shows up, then click on Install button, then enter your user name and password to allow installation to proceed.

  • Close the Terminal and open again.

  • Now we have a special terminal that can install tools with Rosetta translation.

To verify that you are using a Rosetta terminal, run the following command and it should output i386:

1arch

The native terminal without Rosetta would output arm64 for the above command. If you still do not see 1386 in the terminal then please restart the laptop.

Moving forward, all commands we ask you to execute should be done in Rosetta enabled terminal.

Install Xcode command line tools

Check the version of your operating system. If your version number is 10.9 or higher, follow the next step. If your OS X version is less than 10.9, you should consider upgrading your operating system to 10.9 or higher. It's completely free.

In this book, we will not be installing Xcode. Hence no need to download Xcode from App Store. In this section, we will be installing Xcode command line developer tools.

We can install Xcode command line developer tools like so:

1xcode-select --install

Uninstall arm64 brew

If you have installed brew in the past from the native terminal, it is likely that you have an arm64 build of brew. Having two different builds of brew can cause major problems as the packages with different builds will not be compatible with each other.

To avoid this problem you need to uninstall your current installation of arm64 brew.

You can check which build you have by running the following command:

1which brew

If your installation of brew is the Intel build, then the command should output /usr/local/bin/brew. If that is the case you can skip installing brew and just update your current installation by running brew update.

If your output is /opt/homebrew then your installation of brew is the arm64 build.

You need to uninstall the arm64 build of brew by running the following command from the native terminal:

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

Install Intel brew

Install Homebrew, which is the package manager:

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

Once done, run the below command to ensure that we make use of the HEAD revision:

1git -C $(brew --repository homebrew/core) checkout main

Now verify the installation of the brew command:

1which brew

The command should output /usr/local/bin/brew, which is the expected path.

Ensure ZSH is the default shell

Before going forward, please make sure zsh is your default terminal shell. To check that execute the following command.

1echo $SHELL

If the output is not "/bin/zsh" then zsh is not your default shell.

Execute the following command to set zsh shell as default shell manually:

1chsh -s $(which zsh)