Not sure what all those specs mean ... there's no 3.2GHz x 4 ... no idea what the 550 is for ...
But I think you're saying you have the mid-2010 iMac 3.2GHz, either the 21.5-inch or the 27-inch. If you could clarify that it would be helpful.
On the assumption that it is one of those two models, you seriously lucked out. Both of them are capable of running Snow Leopard, which you can order a DVD of from Apple for $20 (assuming you no longer have the original DVDs that came with the machine). Use the DVD to erase the hard drive (after you get asked the language choice, you'll have the option to not proceed with installation and instead run Disk Utility from the menubar), then you can install OS X 10.6.8 on the machine.
Both of those models, if I'm not mistaken, can go up to 16GB of RAM, but only the 27-inch can be upgraded in this manner. If you're lucky enough to have that one, I would strongly suggest maxing out the RAM on that unit, then using the Mac App Store to upgrade to Yosemite. OWC claims that you can upgrade the RAM in a 21.5-inch mid-2010 iMac but I'll be that's an ugly job-and-a-half.
I picked it up used for $350..... Couldn't pass it up.
I have a late 2009 27" iMac I bought new and the used one looks just like it only it's the 21.5" model.
I'll order Snow Leopard on DVD and get this process going.
I'm in the process of erasing the hard drive. I've inserted the disk and started the iMac while holding the option button down. I chose the disk to start from and got it to the white screen with the grey apple and now I've been waiting..... Does it take a while to the install mac OSX screen so I can proceed with erasing the drive?
With the DVD in, reboot and hold down 'C' to boot from the DVD. Leave Installer, go to utilities > Disk Utility > Erase. Format Mc OS Extended, and under Partition . Options make sure GUId is selected. Back to Installer and proceed.
If it won't work alas wrong disc for that model as chas m indicated. Buy a Snow Leopard OS X.6 DVD from Apple Online for $20 including postage. Then follow above procedure.
If your iMac was running Ubuntu, then it suffered from "brain damage" caused by GRUB. Trying to boot it without resetting the parameters probably is not going to work. If you have the correct Snow Leopard DVD, before trying to boot with it, reset the PRAM-NVRAM and then try again.
"brain damage" lol!!
I really appreciate everyones help!!
I followed the directions for the reset.... On the second startup sound I released the keys and held down the option key to bring up the disk so as not to boot back to Ubuntu. Once the disk was brought up on the screen, clicked on it, and I'm back to the white screen and grey apple and no further.....
Any other ideas? Something I did wrong?
Also, you keep mentioning "if i have the correct DVD".
I stated earlier in the thread I am using the DVD bought from Apple OS 10.6.3 for $20...
Is this the correct DVD?
I've also attached a photo of the DVD for you guys to verify weather or not I've got the right DVD.
The minimum OS for this computer is OS 10.6.3 (which just so happens to be the exact OS version mentioned on the Snow Leopard retail disk you have).
Given the fact that you are having problems booting from the Snow Leopard disk...maybe the disk is dirty/damaged (maybe unlikely since it is new). Or the iMac's optical drive is dirty/damaged. You could try blowing some "canned air" in the optical drive slot to see if that helps. If not. Then maybe the optical drive is busted.
Since this computer (I think from what I'm reading) can boot into Ubuntu...does the optical drive work when running Ubuntu?
Another thing you could try (especially if the 2010 iMac's optical drive is busted) is "Target Disk Mode" (if both computers have a Firewire port, and you have a Firewire cable):
At the risk of being leaped upon Luckbonfire, wait for it, it is a thing greenies and yuppies love, Linux, and there as many versions almost as Mac OS X. Try that holding down 'C' after PRAm reset. If the disc opens, leave Installer and go to utilities etc.as set out earlier.