Follow the steps below to use the add-ins.

(1) You draw multiple circles on the sketch so that the pitch circles are adjacent to each other.

(2) You execute the add-in "Multi helical gear".

(3) You select multiple pitch circles in an order that takes into account the meshing relationship.

(4) You set various parameters of the helical gear.

(5) You execute the add-in "Multi helical gear".

Install:
1. Download the installer from the Autodesk App Store.
2. Right-click on the "Downloads" folder and select "Open in Finder".
3. Right-click on the "Multihelicalgear_mac.pkg" -> "Open With" -> "Installer".

Uninstall:
You can unload the add-in without uninstalling it by clicking the "Stop" button when the add-in is selected in the list box on the "Add-Ins" tab of the "Scripts and Add-Ins" dialog.
Unchecking "Run on Startup" causes the add-in not to be loaded in future sessions of Fusion.
- Navigate to the ./ApplicationsPlugins folder and select the app bundle you want to uninstall
- Either drag the app bundle to the Trash or right-click and select “Move to Trash”
- Right-click on the Trash-Can and select “Empty Trash”
- If you prefer keystrokes, you can also just select the app bundle and then hit Command+Delete to move the app to Trash, then empty the Trash and the app will be removed.