Mac 10.6.8 Minecraft 1.6.1 failure to launch

Launcher loads, but will not launch minecraft. The error message is:

---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----
---- (We'll do this automatically later ;D) ----
Client> Exception in thread "main" java.lang.UnsatisfiedLinkError: /Users/robertlandrum/Library/Application Support/minecraft/versions/1.6.1/1.6.1-natives-1372724744064993000/liblwjgl.jnilib:  Library not loaded: @rpath/libjawt.dylib   Referenced from: /Users/robertlandrum/Library/Application Support/minecraft/versions/1.6.1/1.6.1-natives-1372724744064993000/liblwjgl.jnilib   Reason: image not found
Client> 	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
Client> 	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1861)
Client> 	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1778)
Client> 	at java.lang.Runtime.loadLibrary0(Runtime.java:823)
Client> 	at java.lang.System.loadLibrary(System.java:1045)
Client> 	at org.lwjgl.Sys$1.run(Sys.java:73)
Client> 	at java.security.AccessController.doPrivileged(Native Method)
Client> 	at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
Client> 	at org.lwjgl.Sys.loadLibrary(Sys.java:95)
Client> 	at org.lwjgl.Sys.<clinit>(Sys.java:112)
Client> 	at atn.F(SourceFile:1851)
Client> 	at net.minecraft.client.main.Main.main(SourceFile:37)
Game ended with bad state (exit code 1)
Deleting /Users/robertlandrum/Library/Application Support/minecraft/versions/1.6.1/1.6.1-natives-1372724744064993000

My directory structure shows the following:

robertlandrum@mac ~/Library/Application Support/minecraft/versions/1.6.1$ pwd
/Users/robertlandrum/Library/Application Support/minecraft/versions/1.6.1
robertlandrum@mac ~/Library/Application Support/minecraft/versions/1.6.1$ ls -al
total 9240
drwxr-xr-x 4 robertlandrum staff 136 Jul 1 20:25 .
drwxr-xr-x 4 robertlandrum staff 136 Jul 1 20:25 ..
rw-rr- 1 robertlandrum staff 4726671 Jul 1 20:25 1.6.1.jar
rw-rr- 1 robertlandrum staff 1927 Jul 1 20:25 1.6.1.json

What I expected to happen was...:
Minecraft launches in a new window.

What actually happened was...:
New Minecraft icon (the crafting bench) appears in the Dock and promptly goes away.

Steps to Reproduce:
1. Download Minecraft.dmg
2. Copy Minecraft.app to Applications directory (overwriting existing Minecraft.app)
3. Launch Minecraft.app from the applications directory.
4. Confirm you want to launch an application downloaded from the web.
5. Click play.
6. Wait as 1.6.1 downloads.
7. Observe minecraft start and promptly exit.