[MCL-2125] Too long loading (mac)

Like the screenshot below the launcher stops like that for several minutes.
This bug was from about 2013 fall.

Attachments

Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

Really so many Errors in the output

You didn't download Minecraft because of

[21:20:20 ERROR]: Couldn't log in
com.mojang.authlib.exceptions.InvalidCredentialsException: Invalid credentials. Invalid username or password.