my mac:2.9 GHz Intel Core i7 8 GB 1600 MHz DDR3 OS X 10.9.5 (13F34)
java 8
but i can't run it at all . how can i deal with this problem
Exception in thread "main" [19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: java.lang.NoClassDefFoundError: scala/collection/Seq
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at java.lang.Class.forName0(Native Method)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at java.lang.Class.forName(Class.java:344)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:417)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:346)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:214)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: Caused by: java.lang.ClassNotFoundException: scala.collection.Seq
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: ... 11 more
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: Caused by: java.lang.NullPointerException
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
[19:55:24] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream
rintln:748]: ... 13 more