Im not sure but whenever i load up designtech by welsknight on my mac it comes up with this
[08:22:19] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[08:22:19] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[08:22:19] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[08:22:19] [main/INFO] [FML]: Forge Mod Loader version 7.99.39.1566 for Minecraft 1.7.10 loading
[08:22:19] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.6.0_65, running on Mac OS X:x86_64:10.11.4, installed at /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
[08:22:20] [main/INFO] [FML]: [AppEng] Core Init
[08:22:20] [main/WARN] [FML]: The coremod aroma1997.core.coremod.CoreMod does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[08:22:20] [main/WARN] [FML]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[08:22:21] [main/INFO] [STDERR]: [codechicken.core.launch.DepLoader$DepLoadInst:checkExisting:436]: Warning: version of CodeChickenLib, 1.1.3.140 is newer than request 1.1.3.138
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:461]: java.lang.UnsupportedClassVersionError: cofh/asm/LoadingPlugin : Unsupported major.minor version 51.0
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClass1(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.security.AccessController.doPrivileged(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.Class.forName0(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.Class.forName(Class.java:249)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:460)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[08:22:21] [main/ERROR] [FML]: An error occurred trying to configure the minecraft home at /Users/cuttrisj/Documents/Curse/Minecraft/Instances/DesignTech for Forge Mod Loader
java.lang.UnsupportedClassVersionError: cofh/asm/LoadingPlugin : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClass(ClassLoader.java:621) ~[?:1.6.0_65]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) ~[?:1.6.0_65]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) ~[?:1.6.0_65]
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) ~[?:1.6.0_65]
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) ~[?:1.6.0_65]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_65]
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) ~[?:1.6.0_65]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) ~[?:1.6.0_65]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ~[?:1.6.0_65]
at java.lang.Class.forName0(Native Method) ~[?:1.6.0_65]
at java.lang.Class.forName(Class.java:249) ~[?:1.6.0_65]
at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:460) ~[forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389) ~[forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221) ~[forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90) [forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67) [forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34) [forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126) [forge-1.7.10-10.13.4.1566-1.7.10.jar:?]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Exception in thread "main" [08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:461]: java.lang.UnsupportedClassVersionError: cofh/asm/LoadingPlugin : Unsupported major.minor version 51.0
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClass1(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.security.AccessController.doPrivileged(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.Class.forName0(Native Method)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at java.lang.Class.forName(Class.java:249)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:460)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[08:22:21] [main/INFO] [STDERR]: [java.lang.Throwable
rintStackTrace:464]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)