There is a workaround on https://help.ubuntu.com/community/MacBook#head-d374bb9e1b7183c133759a8c6877a34c50c4ba7d
The main idea is to use sofware volume control.
There is a workaround on https:/ /help.ubuntu. com/community/ MacBook# head-d374bb9e1b 7183c133759a8c6 877a34c50c4ba7d
The main idea is to use sofware volume control.