Jar file runs on windows but fails to run on macbook

hi, i developed this app using netbeans on windows and the .jar is runing fine, but when i transfered the jar file to a macbook and double clicked the jar file, it dint run, then i tried to run it from the terminal i got the following exception. please what could be the problem
mustapha-mohammed-kutas-macbook:~ mustaphamohammedkuta$ cd desktop
mustapha-mohammed-kutas-macbook:desktop mustaphamohammedkuta$ cd mustee
mustapha-mohammed-kutas-macbook:mustee mustaphamohammedkuta$ java -jar PayrollProject.jar
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
     at java.lang.ClassLoader.defineClass2(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:774)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:160)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:254)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
     at payrollproject.Main.main(Main.java:34)
mustapha-mohammed-kutas-macbook:mustee mustaphamohammedkuta$

This means the version of Java you're using on the Mac is older than the one you made your jar file with. I believe the default Java on Mac is Java 5. Perhaps you built your classes and jar with Java 6?

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