and I was trying to figure out why my animations aren't taking effect, until I figured out they're not getting exported at all so decided to come and whine about here!

this is a dirty hook for cocos2d-x done on a hurry, it'll be rewritten again, but it kinda works now.
the objective is to make it easy and fast to use:

bool ScSpineBoy::init()
{
    _boy = CCSpine::makeSpine("spineboy-skeleton.json", "boy.png", "boy.plist");
    _boy->loadAnimation("spineboy-walk.json", "walk");
    _boy->loadAnimation("spineboy-jump.json", "jump");
    

_boy->playAnimation("jump", 0, true);

CCSize stageSize = CCDirector::sharedDirector()->getWinSize();
_boy->setPosition(stageSize.width * 0.5, stageSize.height * 0.1);

addChild(_boy);

scheduleUpdate();

return true;
}

void ScSpineBoy::update(float delta)
{
    _boy->update(delta);
}

and yeah it forces the usage of a texture atlas, I used Texture Packer.

though it worked on an XP virtual machine ...

Spine 1.0.12-full
Licensed to: ************
Uncaught
com.badlogic.gdx.utils.GdxRuntimeException: Unable to create OpenGL display.
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.createDisplayPixelFormat(SourceFile:220)
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.setupDisplay(SourceFile:181)
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas.create(SourceFile:184)
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas$1$1.run(SourceFile:86)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:688)
	at java.awt.EventQueue$3.run(EventQueue.java:686)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: org.lwjgl.LWJGLException: Could not get the JAWT interface
	at org.lwjgl.opengl.AWTSurfaceLock.lockAndInitHandle(Native Method)
	at org.lwjgl.opengl.AWTSurfaceLock.access$100(AWTSurfaceLock.java:51)
	at org.lwjgl.opengl.AWTSurfaceLock$1.run(AWTSurfaceLock.java:91)
	at org.lwjgl.opengl.AWTSurfaceLock$1.run(AWTSurfaceLock.java:89)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.lwjgl.opengl.AWTSurfaceLock.privilegedLockAndInitHandle(AWTSurfaceLock.java:89)
	at org.lwjgl.opengl.AWTSurfaceLock.lockAndGetHandle(AWTSurfaceLock.java:66)
	at org.lwjgl.opengl.MacOSXCanvasPeerInfo.initHandle(MacOSXCanvasPeerInfo.java:64)
	at org.lwjgl.opengl.MacOSXDisplayPeerInfo.doLockAndInitHandle(MacOSXDisplayPeerInfo.java:56)
	at org.lwjgl.opengl.PeerInfo.lockAndGetHandle(PeerInfo.java:85)
	at org.lwjgl.opengl.MacOSXDisplay.createWindow(MacOSXDisplay.java:136)
	at org.lwjgl.opengl.Display.createWindow(Display.java:303)
	at org.lwjgl.opengl.Display.create(Display.java:845)
	at org.lwjgl.opengl.Display.create(Display.java:754)
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.createDisplayPixelFormat(SourceFile:216)
	... 17 more
Uncaught
com.badlogic.gdx.utils.GdxRuntimeException: com.badlogic.gdx.utils.GdxRuntimeException: Unable to create OpenGL display.
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas.create(SourceFile:193)
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas$1$1.run(SourceFile:86)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:688)
	at java.awt.EventQueue$3.run(EventQueue.java:686)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Unable to create OpenGL display.
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.createDisplayPixelFormat(SourceFile:220)
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.setupDisplay(SourceFile:181)
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas.create(SourceFile:184)
	... 15 more
Caused by: org.lwjgl.LWJGLException: Could not get the JAWT interface
	at org.lwjgl.opengl.AWTSurfaceLock.lockAndInitHandle(Native Method)
	at org.lwjgl.opengl.AWTSurfaceLock.access$100(AWTSurfaceLock.java:51)
	at org.lwjgl.opengl.AWTSurfaceLock$1.run(AWTSurfaceLock.java:91)
	at org.lwjgl.opengl.AWTSurfaceLock$1.run(AWTSurfaceLock.java:89)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.lwjgl.opengl.AWTSurfaceLock.privilegedLockAndInitHandle(AWTSurfaceLock.java:89)
	at org.lwjgl.opengl.AWTSurfaceLock.lockAndGetHandle(AWTSurfaceLock.java:66)
	at org.lwjgl.opengl.MacOSXCanvasPeerInfo.initHandle(MacOSXCanvasPeerInfo.java:64)
	at org.lwjgl.opengl.MacOSXDisplayPeerInfo.doLockAndInitHandle(MacOSXDisplayPeerInfo.java:56)
	at org.lwjgl.opengl.PeerInfo.lockAndGetHandle(PeerInfo.java:85)
	at org.lwjgl.opengl.MacOSXDisplay.createWindow(MacOSXDisplay.java:136)
	at org.lwjgl.opengl.Display.createWindow(Display.java:303)
	at org.lwjgl.opengl.Display.create(Display.java:845)
	at org.lwjgl.opengl.Display.create(Display.java:754)
	at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.createDisplayPixelFormat(SourceFile:216)
	... 17 more

I think this feature would be implemented if the amount in kickstarted would reach a certain amount, but I think it only make sense in frame-by-frame animation, while here you can just copy the key frames and edit them.

I am currently working on an AS3 lib to handle spine, its mainly a controller that can be attached to anything that implements its interface, so it'll support starling, and displaylist or whatever engine.
But my job is giving me a hard time doing my own projects so it might take some time, then I'll put it in github.

Just downloaded V 1.0.10 to my windows laptop and it crashes at startup, the admin security thingy is disabled.
And its an intel i7 not amd64 like in the log!

Spine 1.0.10-full
Licensed to:
Windows 7 amd64 6.1
NVIDIA Corporation
GeForce GTX 460M/PCIe/SSE2
4.3.0
Java 1.7.0_07
Oracle Corporation
Java HotSpot(TM) 64-Bit Server VM
Started.
Uncaught
java.lang.IllegalStateException: no splash screen available
	at java.awt.SplashScreen.checkVisible(Unknown Source)
	at java.awt.SplashScreen.close(Unknown Source)
	at com.esotericsoftware.spine.editor.Editor.render(Unknown Source)
	at com.badlogic.gdx.backends.lwjgl.LwjglCanvas$3.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$200(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

Gotta say, I really like the GUI and shortcuts, I can tell a lot of thought was put into it. I'll try to hack an AS3 library during this weekend and post it here when done.

Keep it up!

it worked for me out of the box, I bought it through this website, I have Java 7 runtime & sdk installed on osx 10.8.2