we got a report on that on IRC - seems something funky is going on for os x...
looking into that
stacktrace:
Exception in thread "main" java.lang.LinkageError: Version mismatch: jar version is '18', native libary version is '17'
at org.lwjgl.Sys.<clinit>(Sys.java:103)
at tutor.SysSnippet.main(SysSnippet.java:7)
The exception is thrown because DefaultSysImplementation#getJNIVersion()
return different value as the MacOSXSysImplementation.getRequiredJNIVersion(),
which is always 18. DefaultSysImplementation#getJNIVersion() is a native
method and it works.