Autodesk Mechanical Desktop (MDT) 2009 was the final release of the software and has been officially discontinued for over a decade. Finding a reliable, official download link is difficult because Autodesk typically only supports downloads for products up to three versions back from the current release. Official & Legacy Download Status
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Key Features of Autodesk Mechanical Desktop 2009: Autodesk Mechanical Desktop (MDT) 2009 was the final