To install Mortise and Tenon download the add-in from the Autodesk App Store
Windows installation instructions:
Double-click the downloaded MortiseandTenon_win64.msi to install the add-in.
Mac installation instructions (see views 1 to 4):
1. Right-click on the downloads folder.
2. Choose “Open in Finder”.
3. Right-click on the “MortiseandTenon_macos.pkg” -> “Open With” -> “Installer”.
It should open the installer on Mac.
After installing both Windows and Mac:
Mortise and Tenon button will be in the solid tab -> modify (view 5).
A license key input field is in the bottom of the add-in window (view 6). Please enter the license key in the license key input field. It should unlock the add-in.