[Mac] "You need to be online to be able to stream" on OSX 10.7.5

In snapshot version 13w47c, there was a similar bug showing a wrong error message. Now however a different (and still wrong) error message is shown.
Minecraft tells me I need to start it in online mode to be able to stream, while I HAVE started it in online mode.

(Could relate to https://mojang.atlassian.net/browse/MC-40529)