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yed 3.16.1 not working on macOS Sierra

0 votes
yEd 3.16.1 does not work on my MacBook since I've installed macOS sierra.

Error is below. yEd 3.15 still works. I have Java 8 update 101

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/yworks/A/B : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)


Any tips, or is this an issue that needs fixing at the yed end?
in Help by (340 points)

1 Answer

+2 votes

That error message means that you are trying to run yEd 3.16.1 with Java 6 or Java 7 instead of Java 8 (version 52.0 is the class file version for Java 8). This also explains why yEd 3.15 still works - 3.15 is compatible to Java 6, while 3.16.1 requires Java 8.

Did you install yEd from the Mac OSX disk image (yEd-3.16.1_with-JRE8.dmg) or from the Zip archive (yEd-3.16.1.zip)?
How do you run yEd? I.e. do you manually execute "java -jar /path/to/yed.jar"?

by [yWorks] (160k points)
Thanks . I hadn't realised that the command line version of java is not the same as the system java. Installed JDK 1.8_102 and it all works now.
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