Q: Kernel Panics, How do you fix them if you don't have cds supplied with mac?

Kernel panics at startup are frequently due to hardware problems such as bad RAM. Visit The XLab FAQs and read the FAQ on diagnosing kernel panics.

From what you describe you may need to reinstall OS X and that will require the installer discs.

To install Leopard the computer must have an 867 MHz or faster G4, G5, or Intel processor and at least 512 MBs of installed RAM. About 10 GBs of hard drive space is also needed.

Hi SG2, and a warm welcome to the forums!

It ay be some 3rd party APP or kext, try holding the Shift key down at bootup... does it KP then?

Do you have another Mac around?

You should not install Leopard until you resolve the kernel panics are not hardware related. If it's a hardware problem such as bad RAM, failing hard drive, etc., then installing Leopard will not fix the problem. Meanwhile you might try making a cloned backup of your drive to an external drive. Then you can erase the hard drive before installing Leopard. If you are able to erase the hard drive and install Leopard, then likely the kernel panics are caused by software corruption.

Start by doing this:

Repairing the Hard Drive and Permissions

Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.

If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

Next, clone your old system as follows:

How to Clone Using Restore Option of Disk Utility

1. Open Disk Utility from the Utilities folder.
2. Select the destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the destination volume from the left side list and drag it to the Destination entry field.
6. Select the source volume from the left side list and drag it to the Source entry field.
7. Double-check you got it right, then click on the Restore button.

Destination means the drive to which you will restore or backup.
Source means the drive you are restoring from or backing up.

Now, if you don't experience any kernel panics while booted into the installer then you know the problem is software corruption on your old system. This may be simply due to cache corruption, so one way to fix that is to use a utility like TinkerTool System to clear all user, system, and font caches. Also, delete the extensions caches in the /System/Library/ folder - extensions.mkext and one other. They are the only files in that folder.

You would have to get the retail version installer disc for Leopard. Discs supplied with a different model computer will not install on another model.

Please read what others have been saying to you. No set of installer discs will cure this if it is a hardware problem. Your first step should be to determine if it is a hardware issue.

You can use a retail Leopard installer to repair the hard drive (but do not use it to repair permissions) and to clone your hard drive. Otherwise you need to use the installer disc that came with your computer originally or a replacement disc from AppleCare.

I will say again, however, that if you are not able to boot from an installer disc without experiencing a kernel panic, then you have a hardware problem.

It would likely be that you have either a defective disc or a defective optical drive. Of course it's also possible there's a hardware problem other than the optical drive such as a bad motherboard. Only real way to resolve this is to take the computer in for service.