Maverick not downloading from App Store, button turn back grey

Question

Hello,
I'm try to install Maverick on my mac but can't seem to download it from the app store. I already search a lot on that subject and tried many thing, I just can get it to work.
The first time I downloaded it, a download icon appeared in my dock. It was not moving, me not realising it is a 5 gb dl I canceld it. Afterward, I tried to download it from the last purchace user interface of the apple store. When I clikc the grey button, it turn dark grey and the goes back to light gray, displaying no download and not putting any maverick download icon in the dock.
I emptied the cache of the app store through the debug menu, nothing changed after I restarted my computer. Here are my mac specs:
Mac OS X version 10.6.8
Model Name:          iMac
  Model Identifier:          iMac8,1
  Processor Name:          Intel Core 2 Duo
  Processor Speed:          2,4 GHz
  Number Of Processors:          1
  Total Number Of Cores:          2
  L2 Cache:          6 MB
  Memory:          3 GB
  Bus Speed:          1,07 GHz
I have no firewall, no mack keeper, little snitch is disabeled and no antivirus.
Can anybody give a hand on this? Could my hardware be to old to use maverick?

Answer 1

Also wanted to mention that I did not find any file being downloaded on my computer. Maybe it's hidden in a temporary folder, but I doubt it even if some user did solve their issue but finding it on their computer.
Still not working