Hello everyone... I've tried searching for a solution but haven't been able to find anything. I downloaded the 10.5.2 software upgrade through the software updater, it logged out of the desktop view of OS X, went to the install screen, and an error message popped up telling me that the installation failed and that the computer needed to be restarted. After the restart, the Intel Macbook now hangs on the grey apple-logo screen (i'm letting it run at about 45 minutes now because the progress circle is continuing to spin). Here's what I've tried to do thus far: -gone into single user mode and ran /sbin/fsck -fy (it came back okay; rebooted) -tried to boot in safe mode (with the shift key) with no success I am running a 2.0 GHz Intel Macbook (1st generation) with 1 Gb RAM on 10.5.1 (but unclear which version as of now...) Any assistance would be greatly appreciated!