Hallo. I just created a new Ubuntu 16.04 LTS VM in VMWare Fusion 8.5 running on MacOS Sierra host. Everything is running smooth but seems nope to have the launcher auto-hide function working. When I enable it in Ubuntu pref pane, launcher disappears and it's not possible to call for it going full left with mouse on the screen. The above behaviour is the same either at full screen or at single window. It is like the pointer does not "find" anything to reveal (the launcher) at the left border of the screen. Thank you for anybody's help.
Welcome at Fusion community~!
You could open Preferences from Fusion menu > VMware Fusion > Preferences..., and then select 'Always optimize mouse for games' in Gaming drop-down list.
It is an issue which was caused by the work way of Ubuntu Unity bar.
Hope this could help, thank you.