1.6.2 Will not work on Mac OSX 10.5.8

So when I open up minecraft with the new launcher, It runs its usual course, (downloading and starting), but then, once it says "---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----"

It errors and this message shows up below it.

---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- (We'll do this automatically later ;D) ----
Client> 2013-07-09 07:22:12 [CLIENT] [INFO] Setting user: willalexbros
Client> 2013-07-09 07:22:12 [CLIENT] [INFO] (Session ID is token:e2d8f8270b7a49c897bbfcab6ebdb5fc:54734fcfd2df4bf3bde3e83b5e04d39b)
Client> D: MacOSXDisplay.init().nGetCurrentDisplayMode() START
Client> D: MacOSXDisplay.createDisplayMode()
Client> D: MacOSXDisplay.init().nGetCurrentDisplayMode() DONE
Client> 2013-07-09 07:22:13 [CLIENT] [INFO] LWJGL Version: 2.9.1
Client> D: MacOSXDisplay.createPeerInfo()
Client> D: MacOSXPeerInfo constructor
Client> D: MacOSXPeerInfo.choosePixelFormat()
Client> Invalid memory access of location 0x0 rip=0x0
Client> 
Game ended with bad state (exit code 139)
Deleting /Users/Will/Library/Application Support/minecraft/versions/1.6.2/1.6.2-natives-1373372530556467000

It then closes. Thank you for your help.