iMac 2006 stuck at grey screen with apple and spinner
I removed the new hard drive and re-installed the original drive. It booted up with no issues. I connected the new drive externally and checked it under Disk Utility. It appears the hd was corrupt and needed repair. I verified the new drive when I originally cloned it so not sure where things went wrong. Anyways I erased and recloned the drive. All is good.