You need to reboot from the DVD(hold down the C or Option keys at startup) instead of trying to open the installer when the computer is booted into Lion.
If this only produces three beeps, use a different Mac to install the OS onto an external drive and update the system to 10.6.8. Try booting the computer from that drive.
If it still only produces three beeps, you can't without running Mac OS X Server in emulation.
It didn't work...
Three beeps and then nothing...
I can't use a different mac as the only other macs I have are G5 iMacs which are PPC machines and SNow Leopard is Intel.
What I really need to know is what install disks do I need to buy to install Snow Leopard on this iMac as the ones I have already bought require either Leopard to be installed already to upgrade to Snow Leopard and the only original install disks I have are the ones for my PPC iMac G5's (Leopard) which don't work either on this Intel machine.
Basically, no installation disks will work; Apple never released systems beyond 10.6.3 on retail DVDs, and the machine-specific ones won't work either unless you happen to come across a set designed for that specific Mac.
The issue in which the computer beeps three times at startup happens because the disks are too old for that Mac, not because they are upgrade disks; full install disks would do the same thing.
You have a brand new Mac with Lion and you want to go backwards to Snow Leopard? Don't suggest doing that since you will be behind by 2 major MacOS releases. Suggest you install Mountain Lion.
If you do have a new iMac, then suggest you submit your request for a "free upgrade" to Mountain Lion from Apple. You have 30 days from the date of purchase to accomplish this. Otherwise, take the $19 hit and buy M/L upgrade from the App Store.
Now I'm totally confused !!!
When this iMac was fist released it came with Snow Leopard as standard (10.6.6), unfortunately the one I have bought came with Lion so it should be able to run Snow Leopard as it's only that Apple have decided to inculde Lion with it when purchased now.
Plus why would Apples sales staff sell me the Snow Leopard disk when I explained to them exactly what I wanted to do and they knew the full details of the machine I have just bought, so there has to be some way of installing Snow Leopard on it, or I've been conned by Apples sales staff...
So far I'm left with a very expensive new computer with an OS that's not suitable for my needs, Apple sells me the wrong disk and their technical support won't help and send me to this forum to ask other Mac users what to do...
What kind of service is this by Apple !!!
Pretty shoddy to be honest, when you pay so much for a machine and they send you to a forum to try and find the answer to what should be a relativly simple problem...
Thanks for your help and advice anyway, first thing tommorow I'm giving Apple a call to ask to speak to someone this time who knows what their talking about and can solve this for me abd not sell me another disk that I can't even use.
PS: I have been assured the Snow Leopard disks I have bought are indeed only upgrade disks that require Leopard to be installed first to use them to upgrade and are not full install disks that could be used from scratch...
Not sure why you suggest not doing so as OSX Lion is simply not good enough for what I want to use my Mac for. It has too many problems and annoying flaws with it that makes it a nightmare to use and causes all sorts of major headaches when it come to video editing (the main purpose for which I bought it).
I know what I want and what I need and Snow Leopard would be perfect and will be without the problems Lion causes let alone make things even worse by upgrading to Mountain Lion.
Thanks for that info, at least now I know what version of the Snow Leopard disks are I shall have to find...
Unfortunatly my other iMacs are PPC G5's so I cant use them to with the Snow Leopard upgrade disks I have, so In guess I'll just have to scour eBay and find the 10.6.6 ones...
Never realised Apple makes it next to impossible to set up a machine you pay them a small fortune for to the way that actaully suits the user... seems crazy to me...
Installing an OS version on a Mac older than the version it came with is not supported. There's an Apple knowledge base article on this:
It's no surprise you're having a difficult time. Maybe you need to upgrade your video editing software.
Thanks, I'll give it a try but I beleive my Snow Leopard DVDs are only the "upgrade" versions (10.6.3) and without having either Leopard already installed it wont work as they are not the full instaltion DVDs that I require...
All of the so-called 10.6.3 upgrade discs were/are full installer discs. Hold the C key down during a restart with SL DVD inserted. Or, after inserting the SL DVD, change the System Preferences Startup disk to the SL DVD and restart the Mac. After it boots, it's a slow boot process, open Disk Utilities and reformat the Lion partition as 1 partition. Then quit Disk Utilities and install SL. If you didn't make a backup from your previous SL partition, you'll have to reinstall all of your applications.
I've already tried all of those methods using the 10.6.3 disks I bought, they simply don't work as I posted earlier.
All that happens is the machine constantly bleeps 3 times in a row and the DVD drive stops spinning. I know booting from a DVD install disk is a slow process but no matter how long I leave it nothing happens except for the 3 bleeping sounds.
Having scoured the net and spoken to Apple themselves all information tells me these 10.6.3 disks are actually for someone upgrading from Leopard to Snow Leopard.
I have no idea why Apple sold me this version as before I ordered it I explained fully to the sales person what I was wanting to do and they had all the details of this mid 2011 iMac I have bought. So unless the sales person didn't have a clue what they were talking about then I should be able to "downgrade" to Snow Leopard on this iMac as even the specs for this model clearly state on everymac.com that it originaly shipped with OS 10.6.6 (Snow Leapard)
So there must be somewhere I can purchase these 10.6.6 install disks to "downgrade". Trouble is on Ebay or Amazon where you can buy Snow Leopard most of them are 10.6.3 or "retail" versions with no actual version numbers to let me know I'm buying the correct disk.
Who would have thought setting up your computer could be a mission impossible task and why Apple don't help is simply a disgrace to be honest.
The iMac I have just bought is the 27" i5 Mid 2011 model. This model originally shiiped with Snow Leopard 10.6.6 installed, unfortunatly mine has come with OS Lion installed (obviously apple upgraded the OS thinking the customer would like it) but I don't and simply want to go back to a more usable version of the OS that actually does what I require it too and doesn't muck everything up like Lion does.