Minecraft Launcher Will Not Finish Loading

In February I launched Minecraft, and the program downloaded the new launcher. I then experienced an issue, which I reported: MCL-5557.

I am still having this issue.

On August 14, I launched Minecraft again. It downloaded a new version of the launcher. I am still experiencing the same issue, to wit: The Launcher window only says "Loading" and goes no further. I am not getting a crash or a bug report. The application does NOT hang.

To reproduce: Open the new launcher in OSX 10.10.5. I don't know what else to do to get it to reproduce.

NOTE: My prior report was tagged and closed as a duplicate of MCL-5523. But MCL-5523 appears to be an issue with 10.8.5. I repeat, I am running OSX 10.10.5.