If you’ve ever set up a new Mac or had to wipe your system, you already know the pain:
Searching for every app, redownloading installers, trying to remember what tools you had before.

For people who often experiment with software, this becomes nearly impossible to track manually.

But there’s a cleaner, faster, and repeatable method:
Homebrew + Brewfiles.
This combo lets you rebuild your entire app setup with a single command.

What Exactly Is Homebrew?

Homebrew is the unofficial “app store for power users.”
You use the command line to install everything from small utilities to complete macOS applications.

Example:

brew install jq

This single command installs jq, a popular tool for processing JSON files.

If you’re not using Homebrew yet, it’s worth installing. It will forever change how you manage apps on macOS.

What Is Brew Bundle?

Homebrew has a built-in feature called Homebrew Bundle, which automates your entire software setup.

Think of it as a “shopping list” for your Mac.

• You list the apps you want.
  
• Brew reads the list.
  
• Brew installs everything automatically.
  

This list is stored in a file called a Brewfile.

You can have:

• One Brewfile for your entire system
  
• One per user
  
• One per project (great for developers isolating dependencies)
  

How to Create a Brewfile

A Brewfile is a plain-text file that lists your apps.

Method 1: Create and edit manually

Run:

brew bundle edit

This opens your Brewfile in your default text editor (like VS Code or TextEdit).

Here’s what you do next:

1. Add Every App, Tool, or Utility You Want to Keep

Your Brewfile will probably start empty.

Now you begin listing your software.
Each line represents one installation.

Examples:

For command-line tools:

brew “wget”

brew “python”

brew “jq”

For desktop apps (casks):

cask “visual-studio-code”

cask “google-chrome”

cask “slack”

For Mac App Store apps (if you use mas):

mas “Xcode”, id: 497799835

mas “Magnet”, id: 441258766

You can add anything that Homebrew supports.

2. Save the Brewfile

Once you’ve listed the apps you want:

• Press Command + S (or save from the menu)
  
• Close the editor
  

Your Brewfile is now created.

3. Run Brew Bundle to Install Everything

Go back to your terminal and run:

brew bundle install

This command will:

• Install anything missing
  
• Upgrade outdated apps
  
• Skip anything already installed.
  

You’ll see output like:

Using wget

Installing jq

Upgrading python

Fetching slack

This is Brew matching your system to the Brewfile.

Method 2: Add items without opening an editor

Example:

brew bundle add "jq"

This creates a Brewfile in your current directory (if one doesn’t already exist).

Method 3: Use your own custom location

If you want your Brewfile saved somewhere specific:

brew bundle --file=~/my-brewfile add "jq"

Method 4: Use a global Brewfile

This is ideal if you want a universal list for your user account:

brew bundle --global add "jq"

Homebrew creates and manages a standard Brewfile for your user.

How to Use Your Brewfile to Install Everything Again

Once you’ve built your Brewfile, you can recreate your entire environment with a single command.

Example:

brew bundle install --file=~/my-brewfile

Brew will:

• Install anything missing
  
• Upgrade outdated apps
  
• Leave anything current alone.
  

This ensures your system matches the Brewfile, no more guessing what’s installed.

Pro Tips for Managing Your Apps with Brewfiles

Here are efficient things most users miss:

1. Automatically Generate a Brewfile of Everything on Your Mac

If you already use Homebrew heavily, run:

brew bundle --global dump

This creates a Brewfile listing every package you’ve installed.

Most people are shocked at how much they’ve forgotten about.
It’s the perfect time to remove the apps you no longer want.

2. Add Descriptions for Clarity

If you want your Brewfile to include explanations:

brew bundle --global dump --describe

Your Brewfile now contains helpful notes like:

brew "jq", desc: "Command-line JSON processor"

This is huge when revisiting your setup months later.

3. Automatically Remove Apps You Delete From the Brewfile

By default, Brew won’t uninstall anything unless you explicitly allow cleanup.

Option A:

brew bundle cleanup

Option B (recommended):

brew bundle install --cleanup

This installs, upgrades, and removes unused packages in one step.

Advanced Brewfile Superpowers 

Brewfiles can do much more than install packages.

1. Install packages only on macOS or Linux

Perfect for cross-platform teams:

if you’re on OS.mac:

brew "gnupg"  

if you’re on OS.linux:

brew "glibc" 

2. Install VSCode extensions

Yes, Brewfile supports them too:

vscode "editorconfig.editorconfig"

3. Customize how cask apps install

Example: install Firefox into a custom Applications folder:

cask "firefox", args: { appdir: "~/my-apps/Applications" }

4. Install Mac App Store apps

Using the mas command-line tool:

mas "GitBar", id: 6686394657

This means your Brewfile can fully recreate everything from App Store to developer tools.

Final Thoughts

Homebrew already makes installing apps easier, but Brewfiles turn it into a fully automated system.

Whenever you get a new Mac or need to rebuild your current one, you can run a single command and instantly restore every app you depend on.

No more searching.
No more forgotten tools.
No more tedious reinstallations.

Just:

brew bundle install

And your Mac comes back to life exactly how you like it.