For compatible Windows versions or newer Mac versions, official downloads can be found on the Autodesk Account page.
Depending on your intent (e.g., helping a peer or requesting technical support), you can use one of these drafts: Option 1: Professional Inquiry (To Support/Forums) language pack autocad 2013 mac italiano exclusive
If you are looking for an "exclusive" Italian language pack for the 2013 Mac version For compatible Windows versions or newer Mac versions,