OpenJDK 8 supports Mac OS X platform as a first class citizen and building it (using a proper version of toolchain) is almost as easy as on Linux.

Historically, Java had first class support on Mac OS X. JDK was based on the Sun code base but built by Apple and integrated finely into operating system environment. Up to Mac OS X 10.4 Tiger, graphical user interface applications written using the standard Swing toolkit had access to most of the Cocoa native interface features. Applications written in Java were felt to be very close to native ones, while still being cross-platform.

However, for the next releases, the level of Java support went down. Starting from Mac OS X 10.5 Leopard, newer Cocoa features became unsupported for Java. The release of Apple Java 6 was postponed (comparing to Sun releases for other platforms) for more than a year. Java 6 was released in December 2006 but was not available for Mac OS X users until April 2008. Finally, in October 2010...