Are you trying to download AutoCAD 2013 on parallels / Bootcamp on your Mac or are you trying to download AutoCAD for Mac 2013? You may want to try re-downloading your software from the Virtual Agent.
Please let me know how it goes and if you have any other questions. Thank you!
This is an important workflow if you used Time Machine to import AutoCAD.
You can use the uninstaller for AutoCAD but you will need to delete/backup some files starting at step 2.
I have tried to download again from the virtual agent from the Mac software link and also the Autocad link and selecting Mac version. They appear to be identical files. I am getting the same result - the app attempts to start, shows the splash screen and then shuts down. There is no Virtual Machine or Time Machine installations tied to the installation
Can you backup the delete the .data file and restart the program?