I know this an old thread, but the issue is not yet resolved it seems.
I did a quick fix on my machine – saving a shellscript as an OSX app, using Automator:
Open Automator.app and create new Document of type Application
Select Run Shell Script
Paste the following code:
~/Library/Application\ Support/Autodesk/webdeploy/production/Autodesk\ Fusion\ 360.app/Contents/MacOS/Autodesk\ Fusion\ 360
I saved this as Autodesk Fusion 360 Launcher.app in Applications/.
Solved the issue.