What system did my 'Mid 2011' iMac come with?

I have upgraded to Mountain Lion but I'm wondering if the system actually came with Lion or Snow Leopard?

mulgravebrad wrote:
A friend has asked if he buys the machine can he reinstall Snow Leopard on it?
Good question. The Mid 2011 iMac can run Mac OS X Snow Leopard without any problem, but there's a problem: you need a special Snow Leopard version that it's only available on the Mac OS X DVD that Mid 2011 iMacs have got.
If your friend tries to call Apple to try to get DVDs for a Mid 2011 iMac, Apple will ask him/her for the serial number of the iMac. As your iMac came with Lion, Apple won't send him/her the DVDs he/she needs to install Mac OS X.
In conclusion, it's possible to install Snow Leopard, but things like a possible firmware restriction and the lack of the Snow Leopard version that your iMac needs may trun this into a very difficult task

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http://www.btobey.com/learn/imac-ssd-install.php
This describes how I did it. Now I get awesome data performance from my iMac!
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Sudden restarts while using bootable USB installer (mid-2011 iMac) - evidence of hardware problem?

Greetings:
For a couple of years I've been suffering from an issue reported in many threads: seemingly random shutdowns and restarts of my mid-2011 iMac. These can happen several times a day, or there can be a gap of weeks between occurences. I've searched the web and discussions.apple.com endlessly, and tried every conceivable solution. I've observed no consistent pre-restart pattern in Console. I've tried removing all unnecessary extensions and start-up programs. Fixed permissions, repaired HDD, many of the diagnostic procedures described by LINC (superuser on this forum). I would sometimes get temporary relief from periodic restart loops, by unplugging the computer and resetting PRAM, but this would not last long. I couldn't discern whether it is a software/conflict issue, or a hardware issue. Have run AHT in extended looping mode, several times, and found nothing wrong. Which caused me to keep thinking it must be a software issue. The last thing I've tried is a clean install of Yosemite, with full HDD erase, from bootable USB.
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thanks for any insights,
Warren

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
This procedure is a diagnostic test. It makes no changes to your data.
Please triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CSeq 'n Cause: -' | tail | awk '/:/{$4=""; print}' | pbcopy
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window by pressing the key combination command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.
Wait for a new line ending in a dollar sign ($) to appear below what you entered.
The output of the command will be automatically copied to the Clipboard. If the command produced no output, the Clipboard will be empty. Paste into a reply to this message.
The Terminal window doesn't show the output. Please don't copy anything from there.

How do I restore my 27" mid-2011 iMac EXACTLY the way it was after hard disk replacement?

Hi all.
Recently received an email from Apple saying that the 1TB Seagate hard drive in my 27" mid-2011 iMac is apt to fail anytime. Apparently they used some bad hard drives in the mid-2011 27" iMacs which are problematic so they're offering me a free replacement to a brand new hard drive. I'll be sending in my iMac for the replacement sometime in the next few days.
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My question is: When I get my iMac back after the hard disk replacement, will I be able to restore my iMac to EXACTLY the way it was before the replacement using the Time Machine backup & the Lion install disk that I've prepared? When I mean EXACTLY, I do mean EXACTLY, e.g I don't have to re-install all the programs I have, my settings for the programs I have will stay intact, everything is where it should be etc...i.e EXACTLY the way my iMac is right now.
If yes, how do I do it? I've read Pondini's guide: http://pondini.org/TM/14.html
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daniirwan wrote:
baltwo: Thanks for your input! I didn't think of wiping the old HDD before sending it in for the replacement..all those sensitive user data! One question: What's a FWHD?
Already answered. Just note that FW is much faster than USB. See http://help.bombich.com/kb/troubleshooting/how-long-should-the-clone-or-backup-t ake for details.
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Yes.
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Hi All,
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I found a vid on mac-to-mac file migration online. It said to connect the two computers via firewire cable (done), start the new computer (done), start the old computer while holding down the T-key (done), and the old computer's hard drive will show up on the new computer finder window (did happen). Then it says to start Migration Assistant on the new computer (done), and follow directions. That's where I run into a problem. The Migration Assistant says "Looking for other computers" and it never finds the old iMac even though the old iMac's hard drive is visible in the new iMac's finder window. Note that I can click down through directories on the old iMac in the new iMac's finder window.
Any suggestions you can offer would be greatly appreciated.
Thanks much!

Your old machine may too old for Migration Assistant to work. In that case your best bet is to set up the old machine in Target Disk Mode and then drag and drop your files to the new machine. You should only migrate data files, if you have applications on the old machine these should be manually installed on the new machine. If any of the old machine's apps are PPC (Power PC) based these will not run in Lion and will need to be upgraded or replaced prior to installing on the new machine. You can check what apps are PPC based by opening System Profiler (Applications - Utilities - System Profiler), click Applications on the left and then look in the Kind column. Applications that will run in Lion OK are Intel & Universal apps.

Cannot upgrade Thunderbolt firmware on mid-2011 iMac

Hi - I'm having problems updating the Thunderbolt firmware on my mid-2011 iMac (21.5").
Can anyone point me to the proper location for this firmware download? I've found several on the site, but none seem to work for me, due to a variety of OS incompatibilities.
For the curious, here's what my system says:
Hardware Overview:
Model Name: iMac
Model Identifier: iMac12,1
Processor Name: Intel Core i5
Processor Speed: 2.7 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 12 GB
Boot ROM Version: IM121.0047.B1F
SMC Version (system): 1.71f22
Thunderbolt Bus:
Vendor Name: Apple Inc.
Device Name: iMac
UID: 0x0001000A15928E80
Route String: 0
Firmware Version: d.16 (Eng 1)
Domain UUID: 78CF7309-6B81-CC54-A320-6D5B13722358
Port:
Status: No device connected
Link Status: 0x7
Speed: Up to 10 Gb/s x2
Receptacle: 1
Port Micro Firmware Version: 1.2.1
And here are the error messages from a variety of firmware update locations:
Thunderbolt Firmware Update v1.2
First error: The package was signed with a certificate that has expired (c'mon Apple!)... Do you want to continue with the installation anyway? (yes!)
Second error: Alert: This software is not supported on your system. (any reason why? OS, old other firmware, what?)
I've tried the tricks of PRAM and SMC resets, moved the com.apple.SoftwareUpdate.plist to the desktop and rebooted, etc., etc., but nothing seems to work.
The issue driving this exploration is that the Thunderbolt port appears to be dead - won't support Target Desktop Mode or the Thunderbolt Gigabit Ethernet adapter.
Thanks in advance for any help!

From that very page, it appears that this model does support Target Display Mode - please see the bold text below.
Am I reading it incorrectly?
Thanks for your help here - it's good to have more than 1 set of eyes looking at this!
- Jeff
What are the requirements for TDM?
A Mac notebook or desktop with a Mini DisplayPort or Thunderbolt connection
A Thunderbolt or Mini DisplayPort cable
A supported iMac with OS X 10.6.1 or later. The table below shows iMac computers that support TDM, the required cables, and the port of the computer to which you are connecting the iMac.
iMac Model
Cable Supported
Port on Source Computer
iMac (27-inch Late 2009)
Mini DisplayPort to Mini DisplayPort
Mini DisplayPort or Thunderbolt
iMac (27-inch Mid 2010)
Mini DisplayPort to Mini DisplayPort
Mini DisplayPort or Thunderbolt
iMac (Mid 2011)
Thunderbolt to Thunderbolt
Thunderbolt
iMac (Mid 2012 and later)
Thunderbolt to Thunderbolt
Thunderbolt

Apple DVD player not working on Mid 2011 iMac running 10.7.2

I have a 21.5-inch, Mid 2011 iMac which came with Lion preinstalled. When I insert a DVD, Apple's DVD player comes up with the following error:
"A valid video device could not be found for playback. [-70017]"
The DVD player works. I can play DVDs using VLC, and I can use it to burn in iDVD, but Apple's own DVD player simply will not recognize it. I hoped this problem might be solved when I upgraded to 10.7.2, but alas it has not.
Does anyone know how to fix or work around this issue? This computer is used daily for my media-heavy job, so leaving it somewhere for service is not really feasible unless I'm completely unable to work on it.

Please read this whole message before doing anything.
This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this exercise is to determine whether the problem is localized to your user account, or is system-wide. Enable guest logins and log in as Guest. For instructions, launch the System Preferences application, select “Help” from the menu bar, and enter “Set up a guest account” (without the quotes) in the search box.
While logged in as Guest, you won’t have access to any of your personal files or settings. Any application you run will behave as if you were running it for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
As Guest, launch the player and test. Same problem(s)?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.

Unable to install Yosemite on mid 2011 iMac 27"

OK, so I have tried to install Yosemite on this mid 2011 iMac for two days now and I get the exact same error message every time:
An error occured when extracting files from the archive AdditionalSpeechVoices.pkg. Abort the installation and reboot.
I have formatted the harddrive, reinstalled the original OS using the Restore via Internet option (the Mac works perfectly with Mac OS X 10.7.X) and then I try to upgrade to Yosemite via App Store and the error is back.
Any ideas regarding what might cause this problem?
TIA

If you find you'll need to replace a faulty module(s) I recommend you do so from Crucial.com which has an excellent reputation for providing top quality and compatible memory modules for Macs. They are guaranteed to work and are warranted. Otherworldcomputing.com is another recognized, reliable source for Mac memory.

What system did my 'Mid 2011' iMac come with?

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