installing upgrade to 4.0

[jauntea]

I downloaded the file and tried to follow the directions to install when I did I got an error message that one file was missing so it couldn't install it. I found the file in the folder and clicked on it but it came back with the message that it didn't have a program to open it. I took a screen shot of the messages which I will try to attach to this message. Not sure where to go from here. So far my experience with Reality has been not good.

[pciccone]

Hi.
This issue is caused by Apple breaking compatibility with past applications. Fortunately there is an easy workaround. Please see this post:

viewtopic.php?f=23&t=660

Thank you.

[jauntea]

I looked at the post but still can't install. The problem is that I have no idea where to find the Disc Utility so that I can complete the process. Forgive me for my ignorance about this.

[pciccone]

Disk Utility is in the /Applications/Utilities folder

[jauntea]

I went to the Disk utility and clicked on the First Aid tab and ran that. Then I tried to run the installer but got the following message. Any other things I might try?