1 2 Previous Next 16 Replies Latest reply: Jan 16, 2008 10:59 AM by franchise59
David Culpepper Level 1 Level 1 (95 points)
My installation fails about 2/3 of the way through with the error message that 'the installer cannot validate the base system'. Suggests I contact the software vendor (Apple) but the DVD did pass verification before the installation began. There are no visible scratches on it. I tried swapping DVD drives and got the same error at the same stage. Mac is a G4 Digital Audio with PowerLogix 1.53 DP/ 1.5 GB RAM. The second DVD drive I tried was an Apple-branded Hitachi DVD from a G5. The same glitch has occurred 4 times now, taking up most of the afternoon.

Digital Audio G4 DP 533, 1.5 GB RAM, DVR-111, Mac OS X (10.4.10), Atlas 15K SCSI RAID, GeForce 5200
  • 1. Re: Leopard  Cannot Validate Base System
    Mike Foley Level 1 Level 1 (5 points)
    Not much help here, but I'm in the same boat. Slight difference is that I get the 'Base System' error before the installer finishes calculating the remaining time.
    My machine is a G4 DP 1GHz MDD w/1.75Gig of RAM, USB 2.0 card & 3 HDs.
    First I tried to upgrade the Tiger install on the original HD. Got the error "cannot validate 'Base System' package" error. Same error after erasing the main HD, removing all USB/Firewire devices other than keyboard/mouse, removing a PCI USB 2.0 card, removing non-Apple RAM, and trying the install on one of the other HDs (had to preserve one good working copy of Tiger on the machine).
    Thinking about disconnecting the second Optical drive (an Apple CD-Rom drive from a B&W G3) and the additional HDs and try again.
    2 notes:
    1. I was able to install Tiger on the machine w/o issue with all my normal peripherals connected.
    2. I was able to install Leopard on my iMac Core2 duo 2.16GHz using the same installer disk w/o issue
    Any ideas are appreciated
  • 2. Re: Leopard  Cannot Validate Base System
    Keemosaby Level 1 Level 1 (15 points)
    Same problem here and I tried all the same things other user's indicated. Upon the suggestion of Apple Support - I shut down the iMac & removed a 3rd part RAM module. Then I put the Apple RAM module into Bank 0. Started computer. Started install over again.

    Leopard installed is running well. All programs seemed to be operating.

    On a possible related issue: I completed several MAC software updates and then I re-installed the 3rd party RAM. Curiously when I tried to complete another MAC software update after installing the 3rd party RAM they failed to complete - 3 times. They are still available as updates but will not complete.

    Both RAM modules were reported by Profile as being just fine. No errors. All looked good and still does.

    Suggest you remove any 3rd party RAM and try installing Leopard over again.

    I will have to remove the 3rd party RAM again and see if the MAC software updates work again!

    Message was edited by: Keemosaby

    Message was edited by: Keemosaby

    Message was edited by: Keemosaby
  • 3. Re: Leopard  Cannot Validate Base System
    David Culpepper Level 1 Level 1 (95 points)
    Could be a problem, I don't know if I can scrounge up 512 MB RAM that is Apple OEM. The Macs I buy are pretty stripped-down when I get them. Like you said, I have good quality RAM, it checks good with ASP and Rember, and Tiger installed and ran fine with it. But, it looks like that's the next thing for me to try.
  • 4. Re: Leopard  Cannot Validate Base System
    Mike Foley Level 1 Level 1 (5 points)
    Tried the "base install" only, but got the same issue...
  • 5. Re: Leopard  Cannot Validate Base System
    David Culpepper Level 1 Level 1 (95 points)
    I admit I was a little skeptical about the RAM but I pulled out all but one piece of 512 MB and the install went smoothly. I've updated, let Spotlight do its indexing, and restarted several times. Now that things are running well I'm going to try putting the RAM back in piece by piece.
  • 6. Re: Leopard  Cannot Validate Base System
    Mike Foley Level 1 Level 1 (5 points)
    Had to try a few different sticks of RAM, but finally found one that the installer liked - dumbest install issue I've ever run into.
    Thanks for the help!
  • 7. Re: Leopard  Cannot Validate Base System
    nerowolfe Level 6 Level 6 (13,070 points)
    Mike Foley wrote:
    Had to try a few different sticks of RAM, but finally found one that the installer liked - dumbest install issue I've ever run into.
    Thanks for the help!

    I have to ask how a "normal" user would deal with this problem. You know, the guy who simply buys Leopard and gets this problem?
    I can't wait to install Leopard on my G5. I need the exercise, mentally and physically
    One day, in the not-to-distant future, this will all be ironed out. And then OS-X.6 will come out
  • 8. Re: Leopard  Cannot Validate Base System
    Michael Harpe1 Level 1 Level 1 (15 points)
    I have had the worst night I have ever had with a Macintosh.

    The system in question is a 15" MacBook Pro (Core Duo version) with 1 GB of RAM and an 80 GB hard drive. This is a completely stock system with no third party memory.

    My system is so hosed that I can't even get Tiger running again. I'm recovering the disk to my G5 tower which will NOT be upgraded any time soon after this little debacle. That seems to be working.

    I got the same error described here. Honestly it acts like a disk error. Once I have a reliable backup I am going to try blowing the system away (BIG pain in the rear due to software re-installs) and trying it one more time. If that doesn't work the whole lot is going back to the Apple Store and someone is fixing this somehow.

    We bought a family pack and my wife installed Leopard on her current model iMac with problems whatsoever.

    Looks like Apple either sent the wrong version out the door or someone really screwed up the release testing. This is really awful. I didn't have this much trouble moving from the old OS 9 to OS X!!!
  • 9. Re: Leopard  Cannot Validate Base System
    ncianca Level 1 Level 1 (15 points)
    You might be to far gone with your Tiger install but maybe this will help others.

    1 Make a clone of your drive with Carbon Copy Cloner.
    2 Do a clean install.
    3 When you restart, use the Migration Assistant to reinstall all your software, accounts, settings etc. from your cloned drive back to your computer with the new Leopard install.
  • 10. Re: Leopard  Cannot Validate Base System
    nerowolfe Level 6 Level 6 (13,070 points)
    ncianca wrote:
    You might be to far gone with your Tiger install but maybe this will help others.

    1 Make a clone of your drive with Carbon Copy Cloner.
    2 Do a clean install.
    3 When you restart, use the Migration Assistant to reinstall all your software, accounts, settings etc. from your cloned drive back to your computer with the new Leopard install.

    And preferably partition the external drive GUID before cloning so you can also boot it if you want to use your old OS intact.
  • 11. Re: Leopard  Cannot Validate Base System
    Dave Troup Level 1 Level 1 (105 points)
    I'm having the same problem - except that the error occurs early in the installation process - and now I can't even reboot using Tiger! So my almost-new iMac is a paperweight. Thanks, Apple.
  • 12. Re: Leopard  Cannot Validate Base System
    reinmedia Level 1 Level 1 (0 points)
    Let's see. I tried installing 10.5 on a completely different drive than 10.4 in my G5. I was impatient and skipped the DVD test and of course, it failed. The real kicker is it has some how affected the Tiger install and when I try to boot my computer just shuts down right after the initial white "apple" screen.
  • 13. Re: Leopard  Cannot Validate Base System
    ncianca Level 1 Level 1 (15 points)
    Sounds like you are trying to boot of the disk that has an incomplete 10.5 install. Have you tried reseting the Power Manager?

    http://docs.info.apple.com/article.html?artnum=14449
  • 14. Re: Leopard  Cannot Validate Base System
    coco_vega Level 1 Level 1 (0 points)
    i have the same problem but i cant put the apple ram back in my macbook because i threw it away? is there another way to install leopard without the apple ram
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