Unable to install sikuli on Mac OS 10.13.2 with java 9 --- workaround

----- workaround -------------------
you might try with 1.1.2 nightly (experimental fixes for Java 9, no guarantee)

as mentioned on the download page for 1.1.1
https://launchpad.net/sikuli/sikulix/1.1.1

Java 9 not supported.

The best is to use Java 8 for SikuliX.

Remove Java 9 if you do not really need it.

If you need Java 9 for other things, run the SikuliX stuff from a Terminal, after having said:
export JAVA_HOME=`/usr/libexex/java_home -v 1.8`

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Unable to setup Sikuli

Mac OS 10.13.2
sikulixsetup-1.1.1.jar

$ java -jar sikulixsetup-1.1.1.jar

[error] RunTimeINIT: *** terminating: Java version must be 1.7 or later!

$ java --version
java 9.0.1
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)