Leopard cannot be installed?

I was trying to install Leopard (because it's supposed to be better than Tiger), but when restarting, using the boot CD, everything works fine until after the language selection window, in which it says that Leopard cannot be installed. Can someone give me a list of reasons of why this might happen?

I am trying to install Leopard on my Power Mac G5. I am currently running 10.4.9 I have 2 hard drives installed - a Mac and a Hitachi. I have the retail Leopard install disc.
When I insert the Leopard install disc I don't get beyond step ONE! I double click on 'restart' and the Leopard install disc spins away in the DVD drive but after letting it run for 1.5 hours all I have is a gray screen with the pointer in it. The pointer moves with the mouse so this isn't a true freeze - I think you might call it a 'hang'. I.E. I never get to the 'choose location' screen. I have verified the permissions on my hard drive.
Can anyone tell me what's up?
THANKS to all.

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"Snow Leopard cannot be installed on this computer"

I have a 2008-2009 mac book pro (The kind that's all silver, no black), It's currently running 10.5.8. I have a snow leopard disk, and the computer sees it. Then when I go to start begin the installation I get "Snow Leopard cannot be installed on this computer." I want to upgrade and I don't want to just go ahead of myself and screw up my macbook, so please give me a hand some one?.
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Just wanted to share with you 2 more reasons it might be. Tech support was going for the hard drive set up being old. That was one reason they wanted me to reformat. So a few more ideas to throw in here. You can go here and read it.
https://discussions.apple.com/message/11058226#11058226

Leopard cannot be installed on MacBook Air

I have not been able to install Leopard on my MacBook Air because of an error message "Mac OS X cannot be installed on "Macintosh HD", because this disk cannot be used to start up your computer." I have gotten this message when trying to install Leopard via remote disk. I used the disk utility to run a disk repair and no problems were found. I am not sure how to resolve this problem.

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3.Turn off Airport on both computers, and activate Remote Install OSX on both computers. This is found in Applications/Utilities. Follow the instructions.
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null

Leopard cannot install

have a new MB and have the install dvd for os x leopard as well. I am running tiger at the minute but when i go to install leopard, after choosing english as the main language, it says leopard cannot be installed on this computer... any ideas??
the leopard disk came with the mac not from buying it seperately
cheers

Two things.
Did you try installing without using the wireless peripherals? If not, give that a go.
Howver, before you install, get a bootable, external HD, and make a bootable backup/clone and ensure that works like the original. That allows you to revert to the previous good state without having to reinstall anything. Then, peruse these
http://docs.info.apple.com/article.html?artnum=106941
http://www.macmaps.com/upgradefaq.html
http://www.macmaps.com/backup.html
http://www.thexlab.com/faqs/installswupdates.html
http://www.thexlab.com/faqs/backuprecovery.html
http://discussions.apple.com/thread.jspa?messageID=5757385
http://discussions.apple.com/thread.jspa?messageID=5666369
http://discussions.apple.com/thread.jspa?messageID=5646414

Snow Leopard can't Install over 10.5.8

I have a macbook pro that currently has Max OS X operating system version 10.5.8 installed on it. This macbook pro is about 3 years old and has a 2.6 GHz Intel Core 2 Duo processor with memory of 4GB and plenty of space on the hard drive (about 86 GB). I put in my new snow leopard install disk (version 10.6.7) and when I start the install the opening screen says "Mac OS X Snow Leopard cannot be installed on this computer." However, I went online and believe that my computer fits all the specifications and it should be able to upgrade. Does anyone know why this may be happening? The model number of my macbook pro is MB134LL/A. Thanks for the help.

zander wrote:
is there anyway to restore the old macbook pro to factory settings as if it just came out of the box without having its original operating disk? Let me know. Thanks.
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Wiped my entire macbook drive and now snow leopard won't install over snow leopard server, HELP!

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Drive Preparation
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5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
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7. After formatting has finished quit DU and return to the installer. Complete the Snow Leopard installation.

Leopard won't install on 1.07 Ghz machine

Hello all.
I get a message saying that Leopard cannot be installed on this machine when I attempt to do so on my 1.07 Ghz 1.25 GB RAM iBook.
I was sure that it qualified for the upgrade.
Any help will be greatly appreciated
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Oh-o,....
It's from another Mac; and I'm guessing that it's the problem??? (crap)

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Many thanks! - Angel

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If you hold the mouse button while you power the machine on, the disk will slide out and you can swap in the retail disk.
Then power off, and this time hold down the C key while booting up and it will boot off of the CD and put you in the installer, allow you to partition the disk, etc.

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Hi,
I have a white MacBook 2GHz Intel and took from a friends black Macbook 2.2GHz Leopard DVD's to install since he will use a mac for Vista. When I try to install it I get a message "This software cannot be installed on this computer" !!! I was surfing on the net but this is usualy problem with old mac's but I cannot believe that my NB is not supported ?!?! Can anyone help ? Also, Apple Hardware Test from Leopard DVD's is giving the same message.

No they are not. 10.5 OS/X install disks are universal. They will not mention MacBook on them. You can not use these CD's on another machine for two reasons: first they will not work. second: it was a license violation for them to be given to you.
-Chris

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R_P.

"Federico_82" is correct. The gray disks that are shipped with the computer can only be used on the computer they shipped with and will not run on any other machine. You need to purchase the "Retail" version of 10.5 to install it on your machine.

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"OSX Mavericks cannot be installed on this computer" is the message that I receive when trying to download Maveracks. I have a late 2007 iMac with Snow Leopard 10.6.8 installed, 167gb free space and 3 gb memory. What are reasons that it won't download?

Does your computer meet the requirements listed below?
To install Mavericks, you need one of these Macs:
iMac (Mid-2007 or later)
MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later),
MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later)
MacBook Air (Late 2008 or later)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009)

Leopard cannot be installed?

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