I get this error right after clicking 'PLAY Download 1.11.2 - latest release'
Name: hit3.ogg
URL: http://resources.download.minecraft.net/ad/ad126e435cca94054bf0d616301799a105526cde
Error details: Request error -324: ERR_EMPTY_RESPONSE
Filename on disk: ad126e435cca94054bf0d616301799a105526cde
Path: /Users/[Username]/Library/Application Support/minecraft/assets/objects/ad/ad126e435cca94054bf0d616301799a105526cde
Exists: false

When using the old launcher i get this error:
Exception in thread "main" java.lang.UnsupportedClassVersionError: net/minecraft/client/main/Main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

Can someone help?