Downloading and Installing Open JDK 10 is easy, and does not need to uninstall the existing version of the JDK. Here are the steps to install Open JDK 10 1) Download Open JDK 10 from https://download.java.net/java/GA/jdk10/10.0.2/19aef61b38124481863b1413dce1855f/13/openjdk-10.0.2_osx-x64_bin.tar.gz 2) Go to the downloaded file's parent folder, and extract the JDK using $tar -xvf openjdk-10.0.2_osx-x64_bin.tar.gz 3) Copy the extracted JDK to the Mac JDK installations folder $sudo cp -R ~/Downloads/jdk-10.0.2.jdk /Library/Java/JavaVirtualMachines/ 4) Update, and export JAVA_HOME, PATH in the ~/.bash_profile (or) ~/.bashrc file. JAVA_HOME=" /Library/Java/JavaVirtualMachines/jdk-10.0.2.jdk/Contents/Home " PATH="$PATH:${JAVA_HOME}/bin" export JAVA_HOME PATH 5) Source the bash_profile/bashrc file to detect the changes. $ source ~/.bash_profile 6) Open a new Terminal and verify open JDK installation for ja...