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Brew Install MySQL

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Publicado em: 22/08/2025

Installing MySQL with Homebrew on macOS

This article provides a step-by-step guide on installing MySQL on macOS using Homebrew. Homebrew is a package manager that simplifies the installation of software on macOS. This guide is intended for developers with basic command-line experience.

Fundamental Concepts / Prerequisites

Before proceeding, ensure you have the following:

  • Homebrew: Homebrew needs to be installed on your macOS system. If you don't have it, you can install it by running the following command in your terminal: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  • macOS: This guide is specifically tailored for macOS.
  • Terminal Access: You need a terminal application to execute commands. Terminal is usually located in `/Applications/Utilities`.

Installing MySQL

The core process involves updating Homebrew, installing MySQL, and then starting the MySQL service.


# 1. Update Homebrew
brew update

# 2. Install MySQL
brew install mysql

# 3. Secure the MySQL installation (Highly recommended!)
mysql_secure_installation

# 4. Start the MySQL service (This starts MySQL in the background)
brew services start mysql

# 5. Stop the MySQL service (Optional, for stopping MySQL)
brew services stop mysql

# 6. Restart the MySQL service (Optional)
brew services restart mysql

# 7. Connect to MySQL using the mysql client (replace 'your_password' with your root password if set during mysql_secure_installation)
mysql -u root -p

Code Explanation

Step 1: brew update

This command updates the Homebrew package list to ensure you are installing the latest version of MySQL. It refreshes the local copy of the Homebrew repositories.

Step 2: brew install mysql

This command instructs Homebrew to download and install the MySQL package and its dependencies.

Step 3: mysql_secure_installation

This command is crucial for securing your MySQL installation. It prompts you to set a root password, remove anonymous users, disallow remote root login, and remove the test database. It's highly recommended to run this to protect your database.

Step 4: brew services start mysql

This command starts the MySQL server as a background service. This means MySQL will run automatically in the background and be available for use.

Step 5 & 6: brew services stop mysql and brew services restart mysql

These commands allow you to stop and restart the MySQL service if needed. This is useful for troubleshooting or applying configuration changes.

Step 7: mysql -u root -p

This command attempts to connect to the MySQL server as the root user. You will be prompted for the password you set during the mysql_secure_installation process. If you did not set a password during the secure installation, you may be able to connect without a password. This is a crucial step to verify your installation and begin managing your databases.

Complexity Analysis

The installation process complexity is primarily determined by Homebrew and MySQL's installation scripts.

Time Complexity: The time complexity is difficult to precisely define as it depends on network speed for downloading the packages and the speed of your disk for installation. However, it's generally considered to be O(n), where n is the size of the MySQL package and its dependencies that Homebrew needs to download and install. The `mysql_secure_installation` process adds minimal overhead.

Space Complexity: The space complexity is also O(n), where n is the size of the installed MySQL binaries and data directory. This depends on the version of MySQL and the amount of data stored in your databases.

Alternative Approaches

Instead of using Homebrew, you can download the official MySQL Community Server DMG installer from the MySQL website. This installer provides a graphical interface for installing MySQL. However, using Homebrew provides a more streamlined and automated installation experience, along with easier updates and management of the MySQL service. Furthermore, the DMG installer often includes additional tools that are not strictly necessary for basic MySQL server functionality, leading to a larger installation footprint.

Conclusion

Using Homebrew to install MySQL on macOS provides a simple and efficient method for setting up your database server. By following the steps outlined in this guide, you can quickly have MySQL up and running, ready for development and testing. Remember to always secure your MySQL installation with the `mysql_secure_installation` script after installing.