Stuck in a seemingly endless loop.....

[ladytonya]

I downloaded the GM from the App Store by redeeming the code but now after the download my installation is stuck in an endless loop. I've been going back and forth between Installing and calculating remaining time for 45 minutes and the time isn't going down at all, 33 minutes remaining. Help!

 

[wild al]

I downloaded the GM from the App Store by redeeming the code but now after the download my installation is stuck in an endless loop. I've been going back and forth between Installing and calculating remaining time for 45 minutes and the time isn't going down at all, 33 minutes remaining. Help!

I had a very similar experience. It was at 34 minutes that it started. After about 60 min, it stopped going back and forth and very slowly counted down and ultimately completed the install. Try letting it just run even as much as two hours.