I have tried command that I found and it works for second and after that second client closes.
open -na /Applications/Mumble.app
Other command that I tryied with the same resul.
/Applications/Mumble.app/Contents/MacOS/Mumble &
[2] 27307
[1] Exit 126 /Applications/Mumble.app
What command I must use to have multiple Mumble instances open?
-mwhen starting the first client, did you try that (/Applications/Mumble.app/Contents/MacOS/Mumble -m) – patrix♦ Nov 4 '12 at 20:59