How To Uninstall Java On A Mac Using Brew: A Comprehensive Guide

how to uninstall java on mac using brew
how to uninstall java on mac using brew

Have you ever found yourself caught in a labyrinth while attempting to uninstall Java from your Mac? If yes, then this detailed guide is just what you need. By the end of this article, you’ll have a firm grasp on how to smoothly uninstall Java using Brew on your Mac. This guide is comprehensive, extending its coverage to all Java versions, be it Java 7, 8, 10, 11, 13, or 14. Remember, you’ll need to have administrative privileges on your Mac to carry out these operations.

Preliminary Insights

Before we dive into the actual process, let’s take a moment to understand some potential obstacles that may come our way during the process. Sometimes, you may encounter stubborn Java files that refuse to delete, throwing an ‘Operation not permitted’ error. This might happen even when you’re executing commands as a root user. Moreover, you might find Brew failing to uninstall OpenJDK, citing ‘No such keg’ or ‘No available formula’ errors. Don’t worry, we’ll guide you through all of this.

The Comprehensive Procedure To Remove All Java Versions From Mac OS

Open The Terminal

Initiate the process by launching the Terminal on your Mac. For the uninitiated, the Terminal is the gateway to command line on Mac. You can open it by using the CMD + Space shortcut key and then typing ‘terminal’. This will open a console window where you can type and execute commands.

Execute The Deletion Commands

Once the Terminal is up and running, you’re ready to input commands. Enter the following commands one by one:

sudo rm -rf /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -rf /Library/PreferencePanes/JavaControlPanel.prefPane
sudo rm -rf /Library/Application\ Support/Oracle/Java/
sudo rm -rf /Library/Java/JavaVirtualMachines

These commands are meant to delete the Java plugins, control panels, JDK, JRE, and JVM from your system. The ‘sudo’ prefix is used to execute commands with root privileges, while ‘rm -rf’ is used to remove files and directories.

Verify The Uninstallation

After successfully executing the aforementioned commands, it’s time to verify if Java has been uninstalled completely from your Mac. To do this, run the command:

/usr/libexec/java_home -V

This command checks and displays any Java versions installed on your system. If the uninstallation was successful, this command will not return any Java version, confirming that you’ve removed Java successfully.

Method To Uninstall Specific Java Versions From Mac

If you wish to uninstall a specific Java version rather than all versions, this section is for you.

Identify The Java Versions Installed

Your first step should be to identify the Java versions installed on your system. You can do this by using the following command:

/usr/libexec/java_home -V

This command will display all the installed Java versions on your Mac.

Select And Remove The Desired Java Version

Next, you’ll need to select the Java version you wish to remove. For instance, if you want to uninstall Java 8 and Java 11, execute the following commands:

sudo rm -fr /Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk
sudo rm -fr /Library/Java/JavaVirtualMachines/jdk-11.0.7.jdk

This will remove the specified versions of Java from your system.

Procedure To Uninstall Java Using Brew

You can also use Homebrew, a versatile package manager for Mac OS, to uninstall Java. The process is rather simple and quick.

Remove The Current Java Version

To remove the current Java version from your system using Homebrew, execute the following command:

brew cask uninstall java

Remove Open JDK 8 Version

To remove the Open JDK 8 version specifically, use the following command:

brew cask uninstall caskroom/versions/adoptopenjdk8

If the above command fails to execute, you can try the alternative command mentioned below:

brew cask uninstall adoptopenjdk8

Wrapping Up

Throughout this article, we’ve guided you on how to uninstall Java from Mac OS using a variety of methods. By using Terminal commands and the Homebrew package manager, we can efficiently remove any version of Java, including potential future releases. We hope this guide proves helpful and makes your coding journey more streamlined.

FAQ

How to uninstall all Java versions from a Mac?

You can uninstall all Java versions from your Mac by using several commands in the Terminal. These commands remove the Java plugins, control panels, JDK, JRE, and JVM all at once from your system.

How to uninstall a specific Java version from a Mac?

You can uninstall a specific Java version from your Mac by first identifying the installed Java versions using a specific command in the Terminal. Then, use a deletion command specific to the version you want to remove.

What is Homebrew and how is it used to uninstall Java?

Homebrew is a package manager for Mac OS, which simplifies the process of installing and uninstalling software. You can uninstall Java using Homebrew by running specific commands that target the version of Java you wish to remove.

What potential errors might I encounter while uninstalling Java?

While uninstalling Java, you might encounter an ‘Operation not permitted’ error that occurs even when executing commands as a root user. Another error that might occur is Brew failing to uninstall OpenJDK, citing ‘No such keg’ or ‘No available formula’ errors.

How do I check if Java has been uninstalled successfully?

You can check if Java has been uninstalled successfully by running a specific command in the Terminal. This command will not return any Java version if the uninstallation was successful.

Can future Java versions be uninstalled using these methods?

Yes, these methods should work for any Java version, including future releases.