Autocad LT 2015 for Mac

[Anonymous]

Hi,

I am trying to install Autocad LT 2015 trial version onto my Macbook Pro 5.1 (2009). Its got a 2.66GHz processor dual core and 4GB RAM. OS version 10.5.8.

I've downloaded the trial however its does not work. Once I start installation its gives the following message;

Your system already has a copy of AutoCAD LT installed. Please uninstall the existing AutoCAD LT to continue installation. I've not got it installed already.

Is it because my OS is too old?

Thanks

[pendean]

The MAC help forum is at this location http://forums.autodesk.com/t5/autocad-for-mac/ct-p/3011
Installation help forum is here http://forums.autodesk.com/t5/installation-licensing/bd-p/24

FYI: The error message means you've already tried to install LT once already (failed earlier attempt perhaps).