Installing OpenJDK 11 on macOS: A Step-by-Step Guide
Prerequisites
Before we begin, make sure you have the following:
- macOS High Sierra or later
- A Mac with a compatible processor (Intel Core i5 or i7, or AMD equivalent)
- A compatible graphics card (Intel HD Graphics 4000 or later, or AMD Radeon HD 7000 series or later)
- A valid Apple ID or a valid Java Development Kit (JDK) installation
Step 1: Download and Install the OpenJDK 11 Installer
To install OpenJDK 11 on your macOS, you’ll need to download the installer from the Oracle website. Here’s how:
- Go to the Oracle website (www.oracle.com/java/technologies/javase-downloads.html)
- Click on the "Download" button for macOS
- Select the "OpenJDK 11" installer for your macOS version (e.g., macOS High Sierra)
- Choose the "macOS" architecture (32-bit or 64-bit)
- Click on the "Download" button to start the download process
- Once the download is complete, open the downloaded file and follow the installation instructions
Step 2: Install the Java Development Kit (JDK)
After installing the OpenJDK 11 installer, you’ll need to install the Java Development Kit (JDK) to use OpenJDK 11. Here’s how:
- Open the Terminal app on your Mac
- Type the following command to install the JDK:
sudo apt-get install openjdk-11-jdk - Press Enter to run the command
- If prompted, enter your password to install the JDK
- Once the installation is complete, you’ll see a message indicating that the JDK has been installed successfully
Step 3: Set the System Environment Variables
To use OpenJDK 11, you’ll need to set the system environment variables. Here’s how:
- Open the Terminal app on your Mac
- Type the following command to set the system environment variables:
export PATH=$PATH:/usr/local/lib/jdk-11/bin
export JAVA_HOME=/usr/local/lib/jdk-11
export CLASSPATH=$CLASSPATH:/usr/local/lib/jdk-11/lib - Press Enter to run the command
- These environment variables will be set for the current shell session
Step 4: Verify the Installation
To verify that OpenJDK 11 has been installed correctly, you can:
- Open a new Terminal app and type the following command:
java -version - This should display the version of OpenJDK 11 that you installed
Step 5: Install the OpenJDK 11 SDK
To use OpenJDK 11, you’ll need to install the SDK (Software Development Kit). Here’s how:
- Open the Terminal app on your Mac
- Type the following command to install the OpenJDK 11 SDK:
sudo apt-get install openjdk-11-sdk - Press Enter to run the command
- If prompted, enter your password to install the SDK
- Once the installation is complete, you’ll see a message indicating that the SDK has been installed successfully
Step 6: Verify the Installation
To verify that OpenJDK 11 has been installed correctly, you can:
- Open a new Terminal app and type the following command:
java -version - This should display the version of OpenJDK 11 that you installed
- You can also verify that the SDK is installed by running the following command:
jdb -version - This should display the version of the OpenJDK 11 SDK that you installed
Troubleshooting Tips
- If you encounter any issues during the installation process, you can try the following:
- Check the system logs for any errors or warnings
- Verify that the JDK and SDK are installed correctly
- Try reinstalling the JDK and SDK
- Check the system environment variables to ensure that they are set correctly
Conclusion
Installing OpenJDK 11 on macOS is a straightforward process that requires only a few steps. By following these steps, you should be able to install OpenJDK 11 and use it to develop and run Java applications on your Mac. Remember to verify that the installation is correct and to check the system environment variables to ensure that they are set correctly.