If you have problems with Java 6, contact Apple Technical Support. dmg file, -macosx-圆4.dmg Java 7 and later versions are not supported by these older versions of Mac OS X. To install the JDK on macOS: Download the JDK. The JavaFX SDK and Runtime are also installed and integrated into the standard JDK directory structure. When you install the JDK, the associated JRE is installed at the same time. The JDK includes tools useful for developing and testing programs written in. The JDK is a development environment for building applications, applets, and components using the Java programming language. Thank you for downloading this release of the Java™ Platform, Standard Edition Development Kit (JDK™). There click on Accept License Agreement radio button Java SE Development Kit 8 Downloads. Go to the link given here: Scroll down until you see a heading Java SE Development Kit 8u241 followed by a table of JDK 8u241 download options. Open your Browser and go to the Oracle website. Download & Install JDK & JRE 8 on Mac OS.