When I click on the download link from the Maya 2011 serial number page the dmg file begins to download but then randomly it will stop and finish downloading with only 20 MB loaded. When I click on the file to open it I get this message, "The following disk images couldn't be opened, reason no mountable file systems." I have tried downloading this file many times I even got to 984 MB out of the 1.10 GB but it still didn't work. I don't know if it is an issue on my part or Autodesk. Any sugestions would be appreciated, Thanks!
I would re-download it using Firefox and the Browser download option.
You may also try this as well as a backup option:
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=15770983&linkID=9242259