Setting Up an Apple Mac for Software Development

Posted in administration programming with tags administration macos golang javascript python ruby rust -


This is a set of notes for setting up an Apple Mac, specifically as a development system. Current versions of macOS have a fairly good default configuration for general-purpose use, but you do need to to adjust some of the security settings. In addition, you need to install several pieces of software in order to make the system useful for development.

Do This First!

Log in once, run Software Update, and ensure that the operating system is at the latest point release. After all of the updates have been applied, restart the computer.

Log in again and create an Admin user account for your use. If other people will be using the machine, create Standard accounts for them. Log out of the initial account, and log in to the Admin account that you have just created.

Always log in with this new Admin account. The benefit of leaving the initial account untouched is that it ensures that you always have a working account to login with.

Admin accounts have sudo privileges: All Admin accounts on a Mac may use sudo to run command-line utilities with administrative (root) privileges.

You should also find an external hard drive. Begin using Time Machine as soon as possible, as it provides the most easy method for backing up your system.

Configuring a User Account

Configuring The Trackpad

To make the trackpad behave correctly, ensure that these settings are enabled:

  • System Preferences > Trackpad > Tap to click
  • System Preferences > Accessibility > Mouse & Trackpad > Trackpad Options… > Enable dragging

Creating a Private Applications Folder

Once you have logged into your account, create a folder called Applications within your home folder. Whenever you are prompted to drag a new applications into the global Applications folder, put it in this private Applications folder instead. Some applications have to be installed to global folders, but in most cases you can keep the system directories clean by storing third-party products in your private Applications folder.

Securing the Safari Browser

Whether or not you regularly use Safari, you should open it once, and adjust the settings in case that you use it later.

First, choose Safari > Preferences > General and deselect the option Open “safe” files after downloading.

Then, check the plug-in settings. Go to Safari > Preferences > Security > Plug-in Settings… and review the plug-ins and settings.

Configuring Security

Apple provide quite secure operating systems, but unfortunately convenience has won out over security in a few places. These can easily be corrected by changing a few settings. If you are using a laptop then you should probably make all of these changes as soon as possible.

Basic Settings

Select System Preferences > Security & Privacy, and set the following:

  • Under General, set require a password after sleep or screen saver begins to immediately
  • Click Advanced… and select Require an administrator password to access system-wide preferences
  • Under Firewall, click Turn Firewall On.

Enable File Vault NOW

Current versions of macOS include File Vault 2, a full-disk encryption system that has little in common with the much more limited File Vault 1. You should enable File Vault NOW, because it is the only protection against anyone with physical access to your computer. All other security measures will be completely bypassed if someone with physical access simply restarts the computer with a bootable pen drive.

File Vault really is secure, which means that you can permanently lose access to your data if you lose the passwords and the recovery key.

Set a Firmware Password

Set a password to stop access to the Recovery mode. Otherwise, any malicious individual can change the firmware settings to boot from a disc or device of their choosing. If you did not enable File Vault, then the attacker will have complete access to all of the files on the system.

Apple Knowledge Base article HT204455 provides full details.

Setting Up Time Machine Backups

Time Machine is simple to setup. Just take a suitably large external hard drive, plug it in to your Mac, and agree when prompted. The drive setup process will reformat the hard drive. The only settings that may need to change are the exclusions.

Choose System Preferences > Time Machine, and click Options. Add to the exclusions list any folders that contain ISO disk images, virtual machines, or database files (such as Entourage). If the external hard drive is short of space, exclude the System folder.

Setting Up for Development

The first step is to install a compiler. The easiest way to install one is with the Xcode Command Line Tools package.

Once you have the compiler that is provided by Xcode, you can use Homebrew to install everything else that you need. Homebrew itself manages packages for command-line tools and services. The Cask extension to Homebrew enables you to install graphical desktop applications.

Getting Xcode

Apple now provide the Xcode suite as a free download from the App Store. To install Xcode Command Line Tools, install Xcode from the App Store, then open a Terminal window and enter the following command:

xcode-select --install

Setting Up Homebrew

Homebrew provides a package management system for macOS, enabling you to quickly install and update the tools and libraries that you need. Follow the instructions on the site.

You should also amend your PATH, so that the versions of tools that are installed with Homebrew take precedence over others. To do this, edit the file ~/.bash_profile in your home directory to include this line:

export PATH="/usr/local/bin:/usr/local/sbin:~/bin:$PATH"

You need to close all terminal windows for this change to take effect.

To check that Homebrew is installed correctly, run this command in a terminal window:

brew doctor

To update the index of available packages, run this command in a terminal window:

brew update

Installing the Git Version Control System

The Xcode Command Line Tools include a copy of Git, which is now the standard for Open Source development, but this will be out of date.

To install a newer version of Git than Apple provide, use Homebrew. Enter this command in a terminal window:

brew install git

If you do not use Homebrew, go to the Web site and follow the link for Other Download Options to obtain a macOS disk image. Open your downloaded copy of the disk image and run the enclosed installer in the usual way, then dismount the disk image.

Always set your details before you create or clone repositories on a new system. This requires two commands in a terminal window:

git config --global "Your Name"
git config --global ""

The global option means that the setting will apply to every repository that you work with in the current user account.

To enable colors in the output, which can be very helpful, enter this command:

git config --global color.ui auto

Choosing a Text Editor

Current versions of macOS include command-line versions of both Emacs and vim, as well as TextEdit, a desktop text editor. TextEdit is designed for light-weight word processing, and has no support for programming. Unless you already have a preferred editor, I suggest that you install Atom, which is a powerful graphical text editor.

Whichever text editor you choose, remember to set the EDITOR environment variable in your ~/.bash_profile file, so that this editor is automatically invoked by command-line tools like your version control system. For example, put this line in your profile to make vim the favored text editor:

export EDITOR="vim"

To make Atom your default editor, use this line instead:

export EDITOR="atom -w"

Customizing Your Text Editor

You will massively improve your experience with your text editor by adding a useful set of extensions to it. The exact extensions that will benefit the most you depend upon the work that you do, but you should always look at version control integration, convenient access to the terminal, and linters for your preferred programming languages and data file formats.

apm install color-picker file-icons minimap

The file-icons package requires no configuration. Refer to the pages for color-picker and minimap for details on how to use them.

Install code linters for the languages that you use. Atom automatically runs the appropriate linter for the files that you are editing.

This command installs support for CSSLint, ESLint and yaml-js:

apm install linter-csslint linter-eslint linter-js-yaml

If you are a Ruby on Rails developer, use this command to install support for CoffeeLint and Rubocop:

apm install linter-coffeelint linter-rubocop

Setting Up A Directory Structure for Projects

To keep your projects tidy, I would recommend following the Go developer conventions. These guidelines may seem slightly fussy, but they pay off when you have many projects, some of which are on different version control hosts.

First create a top-level directory with a short, generic name like code. By default Go uses a directory called go, but you can change that when you set up a Go installation.

In this directory, create an src sub-directory. For each repository host, create a subdirectory in src that matches your username. Check out projects in the directory. The final directory structure looks like this:


Creating SSH Keys

You will frequently use SSH to access Git repositories or remote UNIX systems. macOS includes the standard OpenSSH suite of tools.

To create an SSH key, run the ssh-keygen command in a terminal window. For example:

ssh-keygen -t rsa -b 4096 -C "Me MyName (MyDevice) <>"

Use 4096-bit RSA keys for all systems. The older DSA standard only supports 1024-bit keys, which are now too small to be considered secure.

Setting Up Environments

nvm and Yarn for Node.js Development

To maintain multiple Node.js versions on your system, use the nvm utility.

Enter this command to install nvm:

 curl -o- | bash

Open a new terminal window and enter this command:

nvm install --lts

This installs the latest LTS release of Node.js, and makes it the default Node.js run-time.

To upgrade the copy of npm that is provided with Node.js, run this command in a terminal window:

npm -g upgrade npm

If you need yarn, enter this command in a terminal window to install it:

brew install yarn

Developer Tools for Go

Use Homebrew to install Go:

brew install golang

Setting a Custom GOPATH

By default, current versions of Go automatically create and use a go directory in your home directory as the GOPATH. To specify a custom GOPATH, such as a code directory, set the GOPATH environment variable in your ~/.bashrc file:

export GOPATH="$HOME/code"

Add this to your PATH:


Close the Terminal and open it again for the changes to take effect.

rustup for Rust Development

The official rustup utility enables you to install the tools for building software with the Rust programming language. Click on the Install button on the front page of the Rust Website, and follow the instructions.

By default, the installer adds the correct directory to your path. If this does not work, add this to your PATH manually:


This process installs all of the tools into your home directory, and does not add any files into system directories.

RVM for Ruby Development

All macOS systems include a copy of Ruby, but it is outdated. To maintain current and clean Ruby environments, use the RVM system.

RVM relies on Git, so you must have a working installation of Git before you can set up RVM.

By default, RVM downloads copies of Ruby that have been compiled for your operating system. If there is no compiled version, RVM then falls back to downloading the source code and then compiling it on your computer. Enter this command to ensure that the requirements for compiling Ruby are on your system, using Homebrew:

brew install autoconf automake gdbm gmp libksba libtool libyaml openssl pkg-config readline

Finally, you can speed up installation of gem packages by disabling the generation of local documentation. To do this, create a file in your home directory with the name .gemrc and put this line in it:

gem: --no-ri --no-rdoc

pyenv for Python Development

Unfortunately, macOS include a copy of Python 2. To maintain current and clean Python environments, use the pyenv system and the pyenv-virtualenv plugin.

Enter this command to install pyenv using Homebrew:

brew install pyenv pyenv-virtualenv

Next, add this line to the ~/.bash_profile file in your home directory:

 if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi

Open a new Terminal window and enter these commands:

pyenv install 3.6.1
pyenv global 3.6.1

These install Python 3.6.1 and make it the default Python run-time.

A Lightweight Setup for Python 2 Development

If you only need to work with Python 2, and prefer not to use pyenv, you can just use the copy of Python that is part of macOS, and add some tools.

First, install pip:

easy_install --user pip

Then add this to your $PATH:


Use pip to install virtualenv:

pip install --user virtualenv

You can now use virtualenv to create Python 2 virtual environments and manage the packages within them using pip, all inside your home directory, and without modifying any system files.

SQL Databases

If you develop any kind of database-driven application, it is useful to have a version of the database server available on your system. Consider using Docker containers for this. If you prefer to install services directly on to your workstation, Homebrew provides packages for PostgreSQL, MariaDB and MySQL.

Installing PostgreSQL

To install PostgreSQL using Homebrew, enter this command in a terminal window:

brew install postgresql

This command installs the server, the command-line tools, and the client libraries that are needed to compile adapters for programming languages. To start the server, follow the instructions that are displayed after the installation process is completed.

Installing MariaDB or MySQL

To install MariaDB using Homebrew, enter this command in a terminal window:

brew install mariadb

To install MySQL using Homebrew, enter this command in a terminal window:

brew install mysql

These commands install the server, the command-line tools, and the client libraries that are needed to compile adapters for programming languages. To start the server, follow the instructions that are displayed after the installation process is completed.

For compatibility, MariaDB uses the same names for command-line tools as MySQL.

Remember to set a password for the root accounts. First, login with the mysql command-line utility:

mysql -u root -q

The -q Option Disables Command History: By default, the command-line client stores the full text of every command in a history file. If you know that you are going to run statements that include passwords or other sensitive data, use the -q option.

Run these statements to change the password for root access:

UPDATE mysql.user SET password = PASSWORD('yourpassword') WHERE user
LIKE ‘root’;

You now need a password to login to the installation as root. To login with root again, use this command:

mysql -u root -p

Enter the password when prompted.

You should also remove the anonymous accounts and test database that MySQL automatically includes:

DELETE FROM mysql.user WHERE user = ’’;

If you intend to duplicate a production environment for testing, create a configuration file on your Mac. Production installations of MySQL should be configured with appropriate SQL modes to enable data integrity safeguards. By default, MySQL permits various types of invalid data to be entered.

Other Useful Desktop Applications for Developers

The ready-to-use versions of VirtualBox are free for personal use, but not actually Open Source. If you want to pay for a virtual machine application with better performance, VMWare Fusion is probably the best product available.

Online Resources

Apple offer overviews and task-orientated help on their support Web site for new macOS users.

Every new user should probably read How to switch to the Mac, by Rui Carmo.

Next article
Notes on PowerShell