Panther to leopard install

Have taken a G5 twin out of mothballs and tried to install leopard over panther - error message says no 10.4 or later detected and aborts install - so unable to make it to archive install option.
Any suggestions please?
Thank you

Leopard 10.5.x is supported in early G5 PowerPC computers.
If you have a retail full installer and not an upgrade disc which
may require a previous near-version of OS X to get there; and
do not have a machine-specific version of OS X that was made
to be used in only one series/model of computer, 10.5 can do it.
See: MacTracker for some handy details on each system.
http://mactracker.ca - this is a free downloadable database.
You may have to get another hard disk drive and ready that for
an all new installation of Leopard; and be sure there is enough
chip RAM installed in the computer to support Leopard well.
If there are two drive bays available, the new system should be
in a place of its own since the older apps and parts won't work
with the newer OS X; or some of them may be sketchy or odd.
Better to cut loose with the older stuff and if possible, you could
have that older system & its apps on a different drive; if you have
the original OS X installer discs and can maintain 10.3 correctly.
And if you do try the two OSX idea, note that some documents
will not like to be made in one version of an application then be
forced to adapt to the older version, since they don't do it well.
Plus, some applications may need to be reinstalled if they still
are Leopard capable, with password or serial number if they
are third party; these also don't like drag/drop moves.
With Panther 10.3.x, have you seen what the automatic
Software Updates selection offers to load, when you run
it? You could still get by for awhile with Panther 10.3.9 &
use a new Camino browser, without much pain. Be sure
you run 'repair disk permissions' in Disk Utility between
any/all system or software installations or updates.
{You may wish to start a new thread of your own so it
will be seen as such, and you will see all new replies.}
Good luck in any event, & happy computing!

Similar Messages

Panther to Leopard...what do I need to do?

I have a 1.8GHz PowerPC iMac G5 which is currently running on Panther 10.3.9. I want to upgrade to Leopard, but attempting to do this using a disc version failed as my Mac doesn't have enough memory. The DIMM0/J4000 memory slot is empty at the moment and I've been told the solution is to buy some more RAM.
The question then is - how much more memory do I need? Is this all I need to do to convert my Mac to Leopard?
Also the guy in the London Apple store told me Apple don't sell RAM for Power PCs any more and gave me the address of another website but from looking on the Apple Store it appears that they do stock it? Any suggestions would be welcome! Thanks

Hi abi145!
You also must use a Full Retail Version, of the Leopard Install DVD.
The disc should look exactly like the images in the above links, and not say Upgrade, CPU Drop-in DVD, or "This software is part of a hardware bundle purchase - not to be sold seperately." on it.
Additional info in these links.
Using OS X Install CDs/DVDs On Multiple Macs
What's A Computer Specific Mac OS X Release
Software Update, Upgrade: What's The Difference?
Repost if that is not what you have.
ali b

My eMac has Leopard installed - urgent help needed

I have an eMac (1.25mhz). Apple's website information states that I can install Leopard. But after installing, I got a “”pinwheel” error, and I could not access the Finder. Now, everything is frozen.
Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor
++ (Mine is 1.25ghz.)
512MB of memory
++ (I have 512MB.)
DVD drive for installation
++ (I have this.)
9GB of available disk space
++ (I have more than double this.)
Using my Family Pack registration, I had easily installed Leopard onto an iMac (2ghz) and MacBook (2.1ghz), so the DVD media is okay.
I want to back-install Panther so I can use the computer again (assuming the system lets me; right now, it's in freeze.) Otherwise, I can’t use the computer.
We don’t own a spare Firewire drive – just the disks I got with my computer. How do I get it working again? Would I really have to toss this machine otherwise?

You can go back to Panther. You wont be able to just do an "upgrade" though and I'm not sure Archive and install will work for back-grading. So, you will probably have to do a clean install, which means completely erasing your hard drive and reinstalling the operating system fresh. This can be done easily with the Panther install disk. When your reinstalling there should be an "options" menu on one of the install screens or something to that effect that lets you choose to erase the hard drive and install the operating system, there is also an option for this in leopard.
Either way, you are going to have to reinstall the OS if you want to get the computer working again. And if you end up doing a complete erase and install I would try to reinstall Leopard again first, it seems like its just a bad install, Leopard should run fine on your system, people have got it running on much less, but if it still doesn't work do the same thing to get back to your install of panther.
As for a simple way to wipe the disk, one does exist. Just boot up from the Leopard (or Panther) install disk. Once it loads click on the "Utilities" menu in the menu bar and then Disk Utility. Select your computers hard drive and select the "Erase" tab. Set the Volume Format to Mac OS Extended (Journaled) if it isn't already selected. Then click Erase, let disk utility do its thing and there you have a nice clean hard drive. After that you can either continue with the leopard install, which I would try first, or you can eject that disk and put in the Panther install disk and install it if you wish.
Message was edited by: compwizz
Message was edited by: compwizz

Canon MP 600 Printer not working after Leopard Install

I installed the Leopard OS and now my Canon MP 600 printer that purchased at the MAC store with my Mac in Aug of this year. It was working properly prior to the Leopard install. I tried re-installing the printer drivers, but no change. I can see my MP 600 as the only printer available. I am also unable to even print a 'test' page. When I run the Network Diagnostics everything is fine, but no printing.
Any suggestions?

I tried this. I also tried updating the CUPS config file as was noted elsewhere. The printer is a total no-show on Leopard.
It is being served by an older G4 whose only job is to serve the printer.
On Tiger it would just *be there* to print to. All the Panther computers see it as a "shared printer" in the printer box.
In Leopard.... not a &^^&% thing.
Not happy.
deviztate wrote:
Are you using a gimp driver? I had the same issue and gimp was the cause. I went to the Canon website and found the driver I needed. After the install and restart all was well. In fact, when I opened Print Utility, I saw that the system had already defaulted to the new Canon driver. Here's the Canon link...
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=182&mo delid=12892
Navigate to drivers and downloads... Hope this helps...
-d

Upgrading Question: From Panther to Leopard... PhotoShop 7.0 to CS3?

I just upgraded from Panther to Leopard and need to upgrade my PhotoShop 7.0 to CS3. What do I need to do to insure the upgrade is successful? And... what do I need to pull from my OS 9 before I delete it?

*"What do I need to do to insure the upgrade is successful? "*
You shouldn't have to do anything...just install CS3.
Regardless, since Photoshop is not an Apple product, you should post your questions on Adobe's discussion forums, rather than an Apple forum that focuses on the isntallation of OS X:
http://www.adobeforums.com

Successful Leopard Install after GUID partition error on Intel iMac

Firstly the hardware:
- Intel iMac 20" (Early 2006) with 750GB HD
- 1 X Iomega MiniMax External HD (750GB)
- 2 X Iomega MiniMax External HD (250GB)
This is what I did:
1) Moved files between external drives (8 hours) and repartitioned all 3 with GUID option.
2) Installed Leopard on one of the external drives (1 hour) and firewire startup to check the machine runs ok on Leopard and confirm access to all other drives, apply all software updates.
3) Back to Tiger on my internal drive and Carbon Copy Cloner to the 750GB external drive (3 hours to copy 300GB). 6 hours to zero out the external drive before the clone. Test startup between the 2 clones.
4) Use Leopard DVD to startup and erase/partition internal drive with GUID option (very scary, but worked fine).
5) Install Leopard on the internal drive (1 hour).
6) Transfer files, settings etc. from the clone during the Leopard install (3 hours). Install all updates.
So far, so good. All applications worked fine including iLife, Photoshop CS3, Aperture, Office 2004 etc. I will keep the Tiger clone for a couple of weeks then delete. Let's hope the next upgrade is not so difficult.
Hope this helps.

Libraries have computers everywhere. I would recommend getting acquainted with your nearest one. If they don't have computers, hours, times, write your local politicians demanding better computers, and hours if there aren't enough. You could have subscribed to Apple Discussions at the library, and learned as much as you needed. The info is out there. http://www.everymac.com/ is another place, so is http://www.apple-history.com/ and many sites you'll find via http://www.macsurfer.com/
Tiger isn't so much outdated, as no longer sold by Apple. Plenty of people still use Tiger, and even Panther, and believe it or not, even Mac OS 9. See this board:
http://discussions.apple.com/category.jspa?categoryID=177
and
http://discussions.apple.com/category.jspa?categoryID=99
So it is not like there aren't people using it. It just becomes harder to find some things, but never would I say impossible.

Mac won't boot after leopard install

hi - installed leopard on my imac but now my mac won't boot:
i have already tried the following:
1) safe mode - but won't boot
2) single user mode - ran fsck - said no issues
3) did target mode with firewire cbale to my macbook and ran disk utility - no repairs needed - and i can see all my files on original computer
4) reinstalled leopard from holding down options key - leopard installed again
but for all of abv - when i reboot i still get white apple logo screen and the spinning wheel...
any other way to get into safe mode - as that is only thing i have not been able to start....
thanks!
susan

tigerswim, welcome to Apple Discussions.
Did you already have Tiger installed or did you have Panther 10.3 installed? Tiger is not a free upgrade; you have to buy it & then update (for free) using the download updates from Apple. Also, you have to use a universal/retail install DVD (or CDs) to install Tiger. You cannot use the install DVD from another model Mac.

Upgrading from Panther to Leopard

Hello,
I wanted to upgrade my Powerbook G4 from Panther to Leopard. Was told I needed to upgrade to Tiger first then to Leopard. I bought the Leopard installation CD and will be using the Tiger installation CD that came with my MacBook. Am I good to go? I already enabled the "root" user and is trying to back up my files (which I have another problem with --- been getting error messages such as 1.) "One or more items can't be copied. Do you want to skip them and copy the remaining items? 2.) You cannot copy the item "Icon" because the name is too long or includes characters that the disk cannot display."
Would very much appreciate any help I could get =)
Many thanks!

As already mentioned you do not need to upgrade first to Tiger. In any event you cannot use an Intel version of Tiger on a PPC Mac or vice-versa. Fortunately, you can upgrade directly to Leopard from Panther or you can do an Archive and Install which is what I would recommend:
How to Perform an Archive and Install
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
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.) 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, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) 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.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.
DO NOT ENABLE THE ROOT USER!! It is not recommended nor necessary for backing up your data. Copying files is not how you do a proper backup. Read the following:
Basic Backup
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. PsynchX 2.1.1 and RsyncX 2.1 (Freeware)
6. Carbon Copy Cloner (Freeware - 3.0 is a Universal Binary)
7. SuperDuper! (Commercial)
8. Intego Personal Backup (Commercial)
9. Data Backup (Commercial)
The following utilities can also be used for backup, but cannot create bootable clones:
1. Backup (requires a .Mac account with Apple both to get the software and to use it.)
2. Toast
3. Impression
4. arRSync
Apple's Backup is a full backup tool capable of also backing up across multiple media such as CD/DVD. However, it cannot create bootable backups. It is primarily an "archiving" utility as are the other two.
Impression and Toast are disk image based backups, only. Particularly useful if you need to backup to CD/DVD across multiple media.
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore. Also read How to Back Up and Restore Your Files.
Although you can buy a complete FireWire drive system, you can also put one together if you are so inclined. It's relatively easy and only requires a Phillips head screwdriver (typically.) You can purchase hard drives separately. This gives you an opportunity to shop for the best prices on a hard drive of your choice. Reliable brands include Seagate, Hitachi, Western Digital, Toshiba, and Fujitsu. You can find reviews and benchmarks on many drives at Storage Review.
Enclosures for FireWire and USB are readily available. You can find only FireWire enclosures, only USB enclosures, and enclosures that feature multiple ports. I would stress getting enclosures that use the Oxford chipsets (911, 921, 922, for example.) You can find enclosures at places such as;
Cool Drives
OWC
WiebeTech
Firewire Direct
California Drives
NewEgg
All you need do is remove a case cover, mount the hard drive in the enclosure and connect the cables, then re-attach the case cover. Usually the only tool required is a small or medium Phillips screwdriver.
Note that before doing your backup you should do the following:
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 shutdown the computer for a couple of minutes and then restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (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.

Upgrade from Panther to Leopard

After buying an iPhone 3GS, I think it's time to finally perform a software upgrade. The newest versions of Firefox and Safari browsers don't run on Panther either. I want to hang on to my 5 year old G4 iMac for at least a couple more years and now have a Leopard pack ready to install (also iLife 09 and iWork 09).
I have a 1GB PC2700 SODIMM on the way, which would raise my total RAM to 1.25 GB. Should I wait until the new RAM is installed before starting the install of Leopard, or would that make little difference?
I have some older software that gets regular use and want to be sure it will still work after Leopard is installed:
1. Quicken 2004 for basic checkbook balancing and account management (don't do any online stuff).
2. Apple Works 6
3. MS Office 2004 for Mac
Plenty of photos saved on iPhoto 4.0.3 and a full music library on iTunes 7.7.1.
Is it safe to go ahead and pop in the Leopard DVD and get this install going, or are there other steps I need to take to avoid losing data from the older programs above?
Thanks for your help!!

If you currently only have 256mb of RAM, you will have to wait. Leopard's minimum is 512mb.
Going from Panther to Leopard is a big jump. Hopefully, you have an external FireWire drive that is at least the size of the iMac's internal drive. What I would do is clone the current internal drive startup volume to the external drive using Carbon Copy Cloner or SuperDuper. Restart using the clone to make sure it works properly, as if you are starting up normally from the internal drive.
While started up from the external clone, run Disk Utility. Run +Repair Disk+ (on the +First Aid+ tab) on the internal drive.
Once you are satisfied that the clone is working properly, disconnect it. It will serve as your backup. You should always have a current backup (of at least your personal data) when doing a major system update. You can now install Leopard on your internal drive. If something goes wrong or if something critical does not work properly under Leopard, you can always restart from your external clone of the previous system, then clone it back to the internal drive. You'll be back to your pre-Leopard state, so you can try it again.
You can then trouble-shoot potential problems and try again. You can also use the +Archive and Install+ option to install Leopard, which retains your user settings and data but gives you a fresh system. The default installation method installs Leopard over the existing system, and that can somethings cause problems; for example, you may have third-party system extensions installed that are not compatible with Leopard.

Will Mac OS X Snow Leopard INSTALL on a IMAc g3 slot lOADER?

will Mac OS X Snow Leopard INSTALL on a IMAc g3 slot lOADER?
Message was edited by: Youngzink13

That's what we needed.
Officially your iMac--known as a "tray-loader" for its optical drive type--can go to Panther (10.3.X). Panther is quite better than Jaguar (10.2.8) that you now have. You probably need more RAM than 160MB for even Jaguar. I feel that 384MB is about min for that OS.
The big problem is that the early iMacs came with painfully small hard drives --4 to 6 G--and OSX need a lot of free space on the disk for efficient performance. It's hard to keep a Jaguar system under 2G with a few useful apps installed.
Bottom line: you'll spent money for a hard-to-find retail OS install disk, more RAM, and a bigger hard drive, and you'll still have a slow computer that will always struggle with modern web pages. If you want to upgrade and experiment as a hobby or learnign experience and you can afford the parts and time, by all means--go for it. However, if cost is an issue, throwing money at this unit is not cost-effective in terms of how much more yo ucan get from it.

Leopard Install problem on iBook G4: Can't mount iBook as FW device anymore

I'll try to very briefly describe my situation and problem, and I appreciate your thoughts ahead of time.
I have a later model iBook G4 (1.2 Ghz, 1.2 GB RAM) that was successfully installed with Leopard about a year ago. It worked great but lately the computer significantly slowed down where basic processes were intolerantly slow. Not having any essential information on it (as I have an iMac Intel as our main home computer), I decided to do an Erase and Install of Leopard onto the iBook, thinking I could just start from scratch. The install was fine and the iBook was very fast again. Ignorantly, I thought if I zapped the PRAM (option-apple, P-R), the computer would run even more efficiently, and that's when I started having start-up problems. It then froze on the gray Apple logo page with the spinning dial. I was too greedy; I should have been content with how it was running to do a random thing like that.
I tried to boot up from my Leopard install disk; I did the restart-option thing and got to the page to choose the HD or the Install Disk, but the install disk never booted.
I read about using the iBook as a firewire device connected to my iMac via the restart-T function. I was able to mount it successfully and reached the point on the installer disk where it came up among other options of drives to install the OS. However, the install disk said it could not install Leopard on the iBook/FW because it needed to be repartitioned as a GUID Partition Drive via Disk Utility. I had no idea what this meant and after exploring options, I decided to erase the iBook HD and see if that enabled me to load Leopard; it didn't help. And then I stumbled across how to make the drive a GUID Partition, and then ala, I was able to start loading Leopard. Unfortunately, about 10 minutes into the load, my iMac went to sleep; I woke it up and realized that the Leopard install had froze. I had to do a hard reset of the iMac, and tried to get back to where I left off, but now I'm unable to get my iBook read as a FW device on the iMac; in other words, the restart-T on the iBook no longer works. When I start the iBook now, there is only a gray screen with no apple logo.
By erasing the iBook HD and incompletely installing Leopard, did I kill the ability to do the restart-T command? Or is it still in there some how? After multiple attempts, it's currently not working.
I have already resigned myself that I've killed it and plan to buy a new Apple laptop, but I thought I'd try y'all for one last try.
Message was edited by: troutandcrane

Thanks for the suggestions, Lyssa.
I was able to reformat the drive back to Mac OS Extended (Journaled) and Apple Partition map via the iMac.
And as you suggested, I put the iMac in Target Disk Mode with the Leopard disk installed. I even got the iBook to recognize the Install Disk; however, upon selecting it, it would freeze at the gray screen with the Apple logo.
I put it away for several hours and decided to try the original Panther install disks. I put the Panter Install Disk #1 into the iBook optical drive and did the restart-option think and selected the install disk. Lo' and behold, I actually got past the apple logo and spinning dial into the start-up screen for installation where I am asked to choose a language! This is the farthest I have got in 24 hours! I proceeded to select English and continue . . . but then the system froze.
After a few more attempts, I am getting less and less progress. It seems that giving the iBook a break from troubleshooting seemed to help; repeated successive attempts only seemed to freeze me at consecutively earlier steps.
I'll try again in the morning with the Panther disks.

Clean Leopard Install - Can't get Photos back in Right (tripling, etc)

Hi. I did a clean Leopard install then loaded my iLife '06. I have my "iPhoto Library" on my external. This contains folders 'originals', 'modified', 'data', and other accoutremonts. In iPhoto, I selected "Import" and thought things were going well till I saw 1) triple copies of each photo 2) no import of my tags for each photo, albums, folders, etc. I see 2000, 2001, 2002, etc. but no 'Canada Vacation', etc.
So, knowing I still had them on my external, I deleted over 10,000 photos from iPhoto to start anew. Then I figured the triples were coming from 'originals', 'modified', 'data' so I tried just importing "originals". This put only 1 copy of the photo in iPhoto, but it's a jumbled mess with no tags, sections, etc.
I checked the help section but am still not 'getting it'. Could someone point me in the right direction or explain what I should do here to get my iPhoto back to where it was pristine/organized? I'm befuddled.

I fixed my problem by accident. I merely dragged my "iPhoto Library" from my external to "pictures" in my home directory.

Creating a backup before Leopard install

Is it possible to back up my entire 80gb imac startup drive to one of my firewire drives with assurance that I can go back to that system if my Leopard install goes haywire? My first attempt to install Leopard failed with some un-useful error message and I was concerned that I might have gotten too far to go back. It seems to have rebooted fine back to 10.4.10, but my other startup drive is 10.2.8 and I'd hate to have to startup from that

Make a bootable clone backup on the FW drive. I use LaCie Silverkeeper 1.1.4.
Most important! Test the bootable clone. Restart your computer with the Option key pressed and your external drive should appear as one of the bootable options. Select its icon and click on it. Only after you boot up and see that the clone is indeed a clone, do you really know that you are safe from any kind of installation problem.
I would also strongly suggest removing the external drive connectio from your computer before installing Leopard to be absolutely sure nothing can happen to it.

I have a copy of Windows 7, and I am trying to bring up Boot Camp on my MacBook with Snow Leopard. But my Snow Leopard install disk is too old for Windows 7, so attempted Boot Camp install of drivers fails.

I have a copy of Windows 7, and I am trying to bring up Boot Camp on my MacBook with Snow Leopard. But my Snow Leopard install disk is too old for Windows 7, so attempted Boot Camp install of drivers fails.
I have hand-installed the NVidia graphics driver, and I have keyboard, minimal trackpad, and hardwire to internet all working. So the WIndows machine is usable. But I am hurting for wi-fi, better trackpad, and whatever else is delivered by Boot Camp. I can't use any of the Boot Camp upgrades because I do not have XP or Vista.

While we all have MacBooks in this forum not all of us use Boot Camp. There's a Boot Camp Support Community where everybody uses Boot Camp. You should also post this question there.
https://discussions.apple.com/community/windows_software/boot_camp

How do I install snow leopard on a 2.1 ghz macbook with 10.5.8 Leopard installed? I have a 10.6.2 unstall disk. It says it can't install snow leopard on this computer.

How do I install Snow Leopard on my Macbook 2.1 ghz, with 10.5.8 Leopard installed?
I have the install disk for Snow Leopard 10.6.2, but when using it for installation, it
states that "Snow Leopard cannot be installed on this computer"!
I understand some features of iOS5 cannot be used unless my iMac and Macbook have
10.7 Lion installed. Correct?

It sounds like your Snow Leopard install disk is the disk that came with another model of Mac (grey lable with no pictures). If so, that's not legal and won't work. You need a retail (white label with the picture of a snow leopard) copy of the installer for each system that didn't come with Snow Leopard.
Regards.

Panther to leopard install

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