Q: Snow leopard  10.6.3 disk is ejected before installation is complete. Disk space is sufficient. What to do?

Unless you have an Early 2009 or earlier model you cannot install the retail version of Snow Leopard.

Are you reinstalling over an existing system, trying to install a clean version?

OK, then do this:

Repair the Hard Drive and Permissions

Boot from your Leopard 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 Utilities menu. 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.

If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro 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.

If all is well try installing Snow Leopard again.

321ruvton wrote:

Disk ejects without completing installation.

If your installing over 10.5, then you should be using a 10.6 disk with a white snow leopard on the front, not black or gray.

Because there is a issue if your reinstalling with the black or gray disks, before completing Disk #1 it ejects and waiting for Disk #2 to be inserted.

I would try rebooting, it's obviously installed and if it didn't then you will have to data recovery, then erase and install.

If you do 10.5 first, (both disks) then install your 10.5 software, then upgrade to 10.6 (overwrites 10.5) your 10.5 software will work in 10.6 (but not in 10.7 or 10.8)

If you didn't make a backup of your users files, then you need to do this step first.

.Create a data recovery/undelete external boot drive

How to erase and install Snow Leopard 10.6

Thanks.

Don't worry, mistakes happen the other around on other posts so it all equals out in the end.

Good Luck.