I purchased OS X 10.7 from the App Store today and have been trying to install it and get it up and running all day long. After reading countless threads and blogs I needed to post my own. Sorry for this being my first post, at least now I can start contributing instead of just reading. Anyway...downloaded lion from the app store and went through the regular installation steps that I was prompted with. Computer restarts and I'm presented with the screen to use time machine, disk utility, safari, etc. I have never gotten the big green check mark indicating that the os is installed. I dont' have my external HD on me at the moment so I can't do a backup and clean install. I have attempted to install the os multiple times to no avail. I have deleted the installer application and re-downloaded it from the App Store, to no avail. I am running 10.6.8 with 2.4 GHz Intel Core 2 Duo and 2 GB RAM. Can anyone shed some light on this? Am I making some stupid mistake? I have upgraded my os myself multiple times and have never had any problems. I'd like to get lion up and running. Thanks.