Hello!
when I try to run the installer on Mac Os X it crashes
[java] $ open /Users/qstatix/Desktop/jMonkeyEngine SDK Installer.app
LSOpenURLsWithRole() failed with error -10810 for the file /Users/qstatix/Desktop/jMonkeyEngine SDK Installer.app.[/java]
[java]$ cd /Users/qstatix/Desktop/jMonkeyEngine SDK Installer.app
localhost:jMonkeyEngine SDK Installer.app qstatix$ cd /Users/qstatix/Desktop/jMonkeyEngine SDK Installer.app/Contents/MacOS
localhost:MacOS qstatix$ ./executable Configuring the installer…
Searching for JVM on the system…
Extracting installation data…
Running the installer wizard…
Exception in thread "main" java.lang.NoClassDefFoundError: org/netbeans/installer/Installer
Caused by: java.lang.ClassNotFoundException: org.netbeans.installer.Installer
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[/java]
Mac Os X 10.6.8 JDK 1.6 path --javahome /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Try running the installer from the downloads or applications folder, its a security issue: http://www.google.de/search?rls=en&q=LSOpenURLsWithRole%2010810
Edit: Or did you move the application via an USB stick or the network after unzipping it? Then chmod +x the executable.
thank you normen
it really was a problem with permissions
I have never seen installer.app on Mac Os X
confused 
So, to make this thread useful, how did you solve it?
ok
I’m using iZip archiver by default
I just unpacked the archive with BetterZip and it solves 
p.s. Mac Os X requires a .dmg containing .app with link to Applications folder or pkg/mpkg for installer. There will be no problems with permissions.
thanks again, sorry my english
Thanks. The unzip utility that comes with MacOSX preserves the attributes too.