Worlds are not loading

any time either of my friends try to load a single player world or try to join a 1.7.10 server (which I have two different 1.7.10 servers currently set up) their games crash. None of this was happening before 1.11.2 or the new launcher.

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 3/5/17 8:03 PM
Description: Unexpected error

java.lang.IndexOutOfBoundsException
 at java.nio.Buffer.checkIndex(Buffer.java:540)
 at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
 at bma.a(SourceFile:271)
 at bma.a(SourceFile:220)
 at bao.a(SourceFile:1694)
 at bao.a(SourceFile:1652)
 at bjb.a(SourceFile:125)
 at hd.a(SourceFile:70)
 at hd.a(SourceFile:13)
 at ej.a(SourceFile:174)
 at bao.p(SourceFile:1585)
 at bao.ak(SourceFile:774)
 at bao.f(SourceFile:728)
 at net.minecraft.client.main.Main.main(SourceFile:148)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
 at java.nio.Buffer.checkIndex(Buffer.java:540)
 at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
 at bma.a(SourceFile:271)
 at bma.a(SourceFile:220)
 at bao.a(SourceFile:1694)
 at bao.a(SourceFile:1652)
 at bjb.a(SourceFile:125)
 at hd.a(SourceFile:70)
 at hd.a(SourceFile:13)
 at ej.a(SourceFile:174)

-- Affected level --
Details:
 Level name: MpServer
 All players: 0 total; []
 Chunk stats: MultiplayerChunkCache: 0, 0
 Level seed: 0
 Level generator: ID 00 - default, ver 1. Features enabled: false
 Level generator options: 
 Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
 Level time: 0 game time, 0 day time
 Level dimension: 0
 Level storage version: 0x00000 - Unknown?
 Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
 Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
 Forced entities: 0 total; []
 Retry entities: 0 total; []
 Server brand: ~ERROR~ NullPointerException: null
 Server type: Integrated singleplayer server
Stacktrace:
 at bjf.a(SourceFile:289)
 at bao.b(SourceFile:1972)
 at bao.f(SourceFile:742)
 at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
 Minecraft Version: 1.7.10
 Operating System: Windows 10 (amd64) version 10.0
 Java Version: 1.8.0_25, Oracle Corporation
 Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
 Memory: 147190176 bytes (140 MB) / 321777664 bytes (306 MB) up to 1060372480 bytes (1011 MB)
 JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
 AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
 IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
 Launched Version: 1.7.10
 LWJGL: 2.9.1
 OpenGL: Intel(R) HD Graphics 4600 GL version 4.3.0 - Build 20.19.15.4531, Intel
 GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

 Is Modded: Probably not. Jar signature remains and client brand is untouched.
 Type: Client (map_client.txt)
 Resource Packs: []
 Current Language: English (US)
 Profiler Position: N/A (disabled)
 Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
 Anisotropic Filtering: Off (1)
#@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Justin\AppData\Roaming\.minecraft\crash-reports\crash-2017-03-05_20.03.15-client.txt
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 3/14/17 8:31 PM
Description: Unexpected error

java.lang.IndexOutOfBoundsException
 at java.nio.Buffer.checkIndex(Buffer.java:540)
 at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
 at bma.a(SourceFile:271)
 at bma.a(SourceFile:220)
 at bao.a(SourceFile:1694)
 at bao.a(SourceFile:1652)
 at bjb.a(SourceFile:125)
 at hd.a(SourceFile:70)
 at hd.a(SourceFile:13)
 at ej.a(SourceFile:174)
 at bao.p(SourceFile:1585)
 at bao.ak(SourceFile:774)
 at bao.f(SourceFile:728)
 at net.minecraft.client.main.Main.main(SourceFile:148)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
 at java.nio.Buffer.checkIndex(Buffer.java:540)
 at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
 at bma.a(SourceFile:271)
 at bma.a(SourceFile:220)
 at bao.a(SourceFile:1694)
 at bao.a(SourceFile:1652)
 at bjb.a(SourceFile:125)
 at hd.a(SourceFile:70)
 at hd.a(SourceFile:13)
 at ej.a(SourceFile:174)

-- Affected level --
Details:
 Level name: MpServer
 All players: 0 total; []
 Chunk stats: MultiplayerChunkCache: 0, 0
 Level seed: 0
 Level generator: ID 00 - default, ver 1. Features enabled: false
 Level generator options: 
 Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
 Level time: 0 game time, 0 day time
 Level dimension: 0
 Level storage version: 0x00000 - Unknown?
 Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
 Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
 Forced entities: 0 total; []
 Retry entities: 0 total; []
 Server brand: ERROR NullPointerException: null
 Server type: Integrated singleplayer server
Stacktrace:
 at bjf.a(SourceFile:289)
 at bao.b(SourceFile:1972)
 at bao.f(SourceFile:742)
 at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
 Minecraft Version: 1.7.10
 Operating System: Mac OS X (x86_64) version 10.12.3
 Java Version: 1.8.0_74, Oracle Corporation
 Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
 Memory: 72192688 bytes (68 MB) / 210599936 bytes (200 MB) up to 2134114304 bytes (2035 MB)
 JVM Flags: 5 total; -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
 AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
 IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
 Launched Version: 1.7.10
 LWJGL: 2.9.1
 OpenGL: Intel(R) Iris(TM) Graphics 6100 GL version 2.1 INTEL-10.22.29, Intel Inc.
 GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

 Is Modded: Probably not. Jar signature remains and client brand is untouched.
 Type: Client (map_client.txt)
 Resource Packs: []
 Current Language: English (US)
 Profiler Position: N/A (disabled)
 Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
 Anisotropic Filtering: Off (1)
#@!@# Game crashed! Crash report saved to: #@!@# /Users/hudsonulrich/Library/Application Support/minecraft/crash-reports/crash-2017-03-14_20.31.24-client.txt