NBI installer doesn't work on JDK9 on Mac (not sure how on other platforms).
I can confirm the same behaviour for Linux. On Windows the installer is launched, but the JDK not found.
The reason is that the files in JDK 9 does not correspond to previous JDK versions. For example /lib/dt.jar is missing in JDK 9
Fixed - http://hg.netbeans.org/core-main/rev/f99407f18f80
Integrated into 'main-silver', will be available in build *201503270001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Libor Fischmeistr <firstname.lastname@example.org>
Log: #251092: NBI installer doesn't work on JDK9