Going from 10.4.11 to 10.6

jobst

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I have a pre-2008 Macbook Pro. I have just installed a new hard drive and 10.4 which came with the computer back in 2006. I then upgraded to 10.4.11.

I have also bought the Mac Box Set. 10.6 now won't install. I start the installation, click restart, my computer reboots, and the disc ejects. I see a folder with a question mark and then 10.4 boots up again. What am I doing wrong?
 
I should have mentioned that I was already holding C and then it would take a while and spit out the disc. The screen then flashed between a folder with a question mark and a circle with a strike through it before going to the usual Apple and starting up.

Zapping the PRAM didn't seem to do anything. Thanks for trying to help.

Any other suggestions?
 
Your MacBook Pro should at least boot to that installer DVD.
You said you installed 10.4 first and updated that to 10.4.11
Is there any reason that you need to restore that system first? Snow Leopard (and the rest of your Box Set) doesn't need any system already installed.
My first thought: Your 10.6 installer DVD is defective. Do you have access to another Mac that you could use to try a test boot with that disk?
 
I installed 10.4 first because I needed to access Disk Utility to format the drive and it was ejecting the disc before the drive was formatted so I guessed that 10.6 required 10.4.11 or 10.5 before it would let me install it. I don't have another Mac unfortunately.
 
You can format the hard drive while you are booted to the installer DVD. You can find Disk Utility in the Utilities menu. You don't have to continue with the install process, just to erase the hard drive. When the erase is complete, you can Quit Disk Utility, then quit the installer, which will restart your Mac.
Hold the Option key down while your Mac restarts. If the Snow Leopard disk is in the drive, you can wait to see if the disk will show up as a bootable drive on that Option-boot picker screen. You can also eject your disk on that screen, and insert a different disk. You can insert your 10.4 disk, wait for it to show on that screen. Eject, and insert the 10.6 disk, and wait to see what happens. If the disk icon doesn't appear, and the disk finally ejects, then I would think your 10.6 DVD is bad.
 
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