No, it is not running.
I’ve uploaded a new snapshot that ignores Mac OSX initialization failures; could you give it a try [1,2]?
I’ve found various user reports that point to the same problem in other applications. Apparently, reflective access to the Apple UI API is now illegal in Java 9 – “The APIs in the com.apple.eawt and com.apple.eio packages are encapsulated, so you won’t be able to compile against them in JDK 9” [3] – so Mac users with Java 9 will need to live with the standard Swing components until BaseX will eventually be upgraded to Java 9.
Right now, I recommend everyone to work with Java 8 anyway until the new JVM has further stabilized (there have been other platform-independent issues with Java 9 that have been reported to us in the recent past).
Best, Christian
[1] http://files.basex.org/releases/latest/ [2] https://github.com/BaseXdb/basex/commit/c02581c8ed4929ec8f4113eff53cc0ba8132... [3] https://docs.oracle.com/javase/9/migrate/toc.htm#JSMIG-GUID-CACA0F19-2AFA-42...