Hello, if you're reading this, you are either stuck or interested in what has happened. My installation of 10.4.9 wasn't successful - in fact, the screen was stuck at the startup with the gray apple/icon loader. I decided to try and fix it. There are two options you can attempt to do to fix this problem if you see what I saw. Option 1 - Repair disk permissions/repair disk 1. Insert your DVD Install Disk for Tiger. 2. Turn your computer on and hold down the option/alt button. 3. Choose your DVD Install Disk. 4. Select your language. 5. Here, there should be your installation welcome message, ignore this. At the top, click on utilities and disk utility. 6. Make sure tab is on First Aid), Select your hard drive and click repair disk and wait for that to finish. 7. Next click repair disk permissions. 8. Do thie repair disk permissions a couple of times. 9. Reboot and see if it works. If that doesn't work, try this: Option 2 - Archive and Install (Previous Systems Folder Creation) 1. Insert your DVD Install Disk for Tiger. 2. Turn your computer on and hold down the option/alt button. 3. Choose your DVD Install Disk. 4. Select your language. 5. Go through your installation setup until you get to installation types. 6. Here you should see this: 7. Click on Archive and Install AND BE SURE TO PRESERVE YOUR USER ACCOUNTS/NETWORKING INFO! If you do not, you lose all your info. 8. Run through installation 9. Delete previous systems folder and reinstall Mac OS X 10.4.9 update There you have it - if any other questions, post here.