Hi Nate,
Sorry about not getting back to you, however I have been keeping an eye on this issue by checking whether new updates of Spine still have the problem.
Unfortunately, as of v1.9.01 I can still reproduce the problem, however I have discovered a strange workaround which I would like to share in case anyone else has it.
Steps to start Spine successfully (so far 100% successful for me):
- Start spine, see the loader
- Cmd-Tab to another application (e.g. Chrome) before the loader finishes
- Spine window will appear
In other words, if the Spine application is currently in the foreground when it finishes loading, the Spine window will not appear and I have to force close the app. However, if Spine is moved to the background before the loader reaches 99%, the Spine window appears consistently.