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I need to port a java desktop app for mac os-x. The app will be launched via JNLP. Is the Java runtime environment pre-installed on MAC-OSX ?
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In macOS, the JRE installation path is /Library/Internet Plug-Ins/JavaAppletPlugin. plugin/Contents/Home/ . The root directory of the JRE software installation. This directory contains README, and other JRE folders.
Java is not required and is not preinstalled in OS X. There are 2 sides to Java. The web browser plug-in/extension - this is the BAD form, as it has been nothing but security holes. HOWEVER, for some reason there are a few institutions that require the Java browser plugin to access their web site.
In general. Java 5 or Java 6 was preinstalled on Mac OS X up to 10.6, but this ceased in 10.7.
Besides, a recent Mac OSX update uninstalls the version of Java 6 plugin previously supported by Apple. Apple have never supported Java 7.
https://blogs.oracle.com/thejavatutorials/entry/apple_s_java_mac_os
You (or your users) need to download and install Java 7 for the Mac from Oracle. But @Andrew Thompson's comment (see above) offers a good way to smooth that "speed bump".
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