Runar Ovesen Hjerpbakk

Science-based software development

Install Java in Mountain Lion

The new version of OS X (10.8), Mountain Lion, does not ship with Java preinstalled. Luckily, installing Java is easier than ever.

  1. Open Terminal (Applications > Utilities > Terminal).
  2. Type in the Command Java and press Enter. This should give the prompt:

No Java runtime present, requesting install.

  1. Software Update will launch and Java will be installed. After the installation is completed, verify the installation by running the command java -version, which will show the currently installed version of Java. The whole process is shown in the screenshot below.

Installing Java in Mountain Lion

Easiest installation ever, next to shipping with Java preinstalled of course…