You will have to buy your own version of Mountain Lion, as that version you have is on the previous users account, not yours. Follow these instructions, they should help
I restarted the computer with the disk in pushing the Option key as you suggested. Now the window states:
You can't open the app "Install Mac OS X.app" because Power PC applications are no longer supported.
Boot normally, insert the SL install disc, System Preferences->Startup Disk, select the install disc, and hit Restart. If that doesn't do the trick, reboot into recovery mode, select Disk Utility, wipe the int HD, quit DU, restart, holding down the C key.
Thanks Baltwo, I thought this was working since i got to the Mac OS X installer. After accepting the Apple agreement a large window opened requesting me to select disk where I wanted it installed. My choice was only my Mac 2tb HD which also had a small yellow triangel with an exclimation mark and below it states Mac OS x cannot start up from this disk.
Not sure of your goal.
- Re-install of Mountain Lion
- Fresh backup of your home directory
- Boot into recovery (either)
- Press command+r on boot. Choose recovery partition.
- Press option key on boot, choose recovery partition.
- Re-install Mountain Lion
- Re-install of Snow Leopard, replacing Mountain Lion
- Order Snow Leopard 10.6 DVD from Apple.
- Back up your home directory
- Press option key at boot, choose Snow Leopard DVD
- Install over current boot disk
- Upgrade Mac OS X to 10.6.8 (either)
- Use Software Update until no more updates are available
- Download combination update for OS X 10.6.8 from Apple
- Use Software Update until no further updates are available
- Re-install of Mountain Lion
VikingOSX above you ask what is my goal. Again, I bought a used iMac and since it's arrival I have found that the previous owner did not do a clean install of 10.8.2. After contacting the previous owner, the original disks were sent with the computer and he had upgraded from 10.6.6 to 10.8.2 via the web so he had no disk to send me. I am completely fine with paying for the upgrade but I thought I needed to take the computer back to it's original status to upgrade to 10.8.2.
I feel somewhat insecure at placing my vital info on a computer that another person had access so I wanted to do a complete reinstall. This is my first Mac.
The problem is that any OS upgrade purchased by the seller is NOT transferable - the license is tied forever to the Apple ID that purchased it.
The seller was obligated to wipe the drive completely and reinstall the original system.
Your problem is now that the disks may not be the correct version; in that case, I'd suggest calling Apple, giving them your serial number, and ask for replacement install disks. Also ask them which version the Mac originally shipped with.
UPDATE: Personally, I would contact the seller and tell him to either do what he is supposed to do and give you a Mac with the original system installed including the disks, or I want my money back. I would not find having to go through hoops to make it work acceptable.
Ok. Put Snow Leopard out of mind.
I would wait until OS X 10.8.3 is released (shortly). Apple will replace 10.8.2 in the App Store with the full 10.8.3 download. Purchase 10.8.3 with your Apple ID, and download to your Mac. The Mountain Lion 10.8.3 installer will get placed in your /Applications folder and auto-launch, asking you if you want to continue. You cancel at this point.
Now, you want to create a bootable USB stick with OS X 10.8.3 on it. Get Lion Diskmaker. This automated tool will ask you for your choice of Lion or Mountain Lion. And then, it will build the USB stick. Use a 16GB stick. You can then move the recently downloaded 10.8.3 installer to an external backup disk. I have personally used Lion Diskmaker and it works like a charm.
Backup your home directory. The next step is data destructive. Apple applications, not part of the OS X install, will need to be reinstalled, as will third-party applications. If you use the Adobe Flash plug-in, you will need to download the latest from Adobe again.
Boot the Mac with the option key to select the USB stick. Do a full, clean install of the latest Mountain Lion to your boot disk. Now you have a clean install tied to your Apple ID.
I'm back, after getting in touch with the previous owner he went to applications, then utilities, disk utility, and erase free space.
Will this be enough to guarantee my security? I want to think the best of him but I need to think more of personal security. Could something still be imbedded to gain access?