Hello Nate. I got this exception :
Mareks-iMac:dog_1_spine_sleep marekledvina$ /Applications/Spine/Spine.app/Contents/MacOS/Spine
input "/Volumes/Storage/Dropbox/Spine/Flying Dog/dog_1_spine_sleep/dog_1_spine_sleep.spine"
output "/Volumes/LaCie/PROJECTS/UNITY_TINGTONG/flying_dog/Assets/Projects/Flying Dog/Spine/dog_1_spine_sleep/"
export "/Volumes/Storage/Dropbox/Spine/Flying Dog/dog_1_spine_sleep/export.json"
Spine Launcher 2.1.01
Mac OS X x86_64 10.10
Java 1.7.0_51 Oracle Corporation
Java HotSpot(TM) 64-Bit Server VM
Spine 2.1.00 Professional, JGLFW
Licensed to: *****, *****
NVIDIA Corporation
NVIDIA GeForce GTX 775M OpenGL Engine
2.1 NVIDIA-10.0.43 310.41.05f01
ERROR: Error loading project: /Volumes/LaCie/PROJECTS/UNITY_TINGTONG/flying_dog/Assets/Projects/Flying Dog/Spine/dog_1_spine_sleep
gK: Cannot open a stream to a directory: /Volumes/LaCie/PROJECTS/UNITY_TINGTONG/flying_dog/Assets/Projects/Flying Dog/Spine/dog_1_spine_sleep (Absolute)
at aw.i(SourceFile:143)
at qO.a(SourceFile:429)
at lH.a(SourceFile:39)
at com.esotericsoftware.spine.editor.Editor.f(SourceFile:462)
at com.esotericsoftware.spine.editor.Editor.a(SourceFile:394)
at ac.d(SourceFile:182)
at lF.d(SourceFile:79)
at ac.a(SourceFile:177)
at ad.run(SourceFile:87)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: java.io.FileNotFoundException: /Volumes/LaCie/PROJECTS/UNITY_TINGTONG/flying_dog/Assets/Projects/Flying Dog/Spine/dog_1_spine_sleep (Is a directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at aw.i(SourceFile:140)
... 22 more
Mareks-iMac:dog_1_spine_sleep marekledvina$
I checked this : open "/Volumes/Storage/Dropbox/Spine/Flying Dog/dog_1_spine_sleep/dog_1_spine_sleep.spine" and it works
this also works : cd "/Volumes/LaCie/PROJECTS/UNITY_TINGTONG/flying_dog/Assets/Projects/Flying Dog/Spine/dog_1_spine_sleep/"
still there is one more bug... when you save export.json and your atlas name is set to atlas.txt you put into json just atlas extension without .txt.
this also works : open "/Volumes/Storage/Dropbox/Spine/Flying Dog/dog_1_spine_sleep/export.json"