OSX Mountain Lion fails to install on 2009/2010 MacPro

I have a Dual Xeon dual cores MACPro and just got the new OS however it fails to install on the MACPro with the error message "Mountain Lion is not compatible with this computer"
My current OS is 10.7.4, does anyone have any imput on this issue has this been seen by anyone else?
Any help would be apreciated.

Macs that can be upgraded to OS X Mountain Lion
iMac (Mid 2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
Xserve (Early 2009)
I'm guessing that you have a Mac Pro 1,1 or 2,1 model from 2006/7. They cannot run Mountain Lion.

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I have the MacIntosh volume and the Boot Camp partition only. I know that when I installed Lion, I had to go through a whole back-up and recovery of Windows and then re-format the drive.
The tech at the Apple Store had a previous life as a MSCE and was very helpful. I believe he even said that I should not have htis problem with Mountain Lion which is why they gave me the flash with it onboard. I was in the process of starting a new job when I went to Lion, so I have waited to do this next and probably last upgrade to this old MBP since I doubt Apple will support this MBP in Maverick.
I do not have another installation, so that is not an option. I will try to create an external, I have plenty of hard drives around and see if I can get it done that way. It might take me a week or two to get back to it, but I will comment back upon completion of that effort. Thanks for your help....Dave Iverson

Mountain lion will not install on late 2010 Mac pro

Mountain lion won't install on late 2010 Mac pro 8 core. After downloading mountain lion I ran the installation software but it gives me the error mountain lion failed to load and doesn't restart the computer.

Welcome to Apple Communities
Open Finder, select Applications, delete the installer, open App Store > Purchases and download OS X

Mountain Lion Failed to Install

In the middle of the install OSX mountain lion jumps to a recovery screen and cancels the install. When I restart the computer I am able to go right back to my normal desktop with nothing lost.
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I have been trying to install mountain lion for a while now. just donloaded the updated version but it still fails.
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Tried a clean install but it doesnt come up with the options to format, it just tries to install but fails.
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Using the same Apple ID I used to purchase Mountain Lion on my Mac Pro, I signed into the Mac App Store on my iMac and downloaded Mountain Lion with no issues. The iMac is running 10.6.8.
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Doug

I recommend backing up your system, and before going into the install, checking disk utility > verify disk > macintosh hd partition > to make sure the partition is okay.
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Anybody have any solutions to Apples debacle on Mtn lion install issues? After attempting to install twice, all i get is the spinny clock and my imac quad core i7 never boots. Ran disk utility before I ever installed, and ran it twice after in recovery mode. No problems on internal drive. DVD drive seems to have mysteriously bought the farm though. Booted in verbose and I did get one error mentioning boot cahce control undnable to open no such file or directory. Thought that was from the old days of leopard. Argghh...

Update
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AirPlay
AirPlay Mirroring requires a second-generation Apple TV or later, and is supported on the following Mac models: iMac (Mid 2011 or newer), Mac mini (Mid 2011 or newer), MacBook Air (Mid 2011 or newer), and MacBook Pro (Early 2011 or newer).
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How to set up and configure AirPort Express for AirPlay and iTunes
Troubleshooting AirPlay and AirPlay Mirroring
Using AirPlay

Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition

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Verify your computer can run Mountain Lion:
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
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       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
         7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
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Repair the Hard Drive and Permissions
Boot from your Snow Leopard 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 Utilities menu. 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.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro 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.
Now try installing Mountain Lion.

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Hi all
I would like to download but not install OSX Mountain Lion on my MBP which is currently running OSX Mavericks.
This however seems impossible. I think OSX Mavericks were already installed on my MBP and therefore it seems "impossible" to download it.
Now, why would I to do this? The answer is quite reasonable, due to certain demands related to an application portfolio I need Mountain Lion, because the portfolio is not upgraded to run on Mavericks. And, it is more reasonable to downgrade a version of OSX, rather waiting for the portfolio upgrade which can take years.
Yes, I need to downgrade my secondary MBP which also came with preinstalled Mavericks. This can be done, if I only could download but not install Moutain Lion.
It should be easy enough; download Mountain Lion, make an installer and make a bootable thumb usb stick. Then erase Mavericks and install Mountain Lion.
I have previously bought Mountain Lion so it is accessible to me in the App Store, but whenever I try to hit the Download button, I get a message saying this can't be done, since I am running Mavericks.
This bugs me, it should be obvious users needs the flexibility to swap whatever OSX version they need. It is still software.
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I would like to see answers like:
"In order to get this to work, you first have to disable the locking mechanism in [...] " instead of "No, this is impossible to do"
Regards

Thanks for your reply Eric
Can't help wondering thought, people are ok with this?
Basically Apple are saying: "Do not attempt to install an older version of OSX which came preinstalled. If so, expect multiple failures." Really?! Has it always been so? For me it's not like I'm going to install Snow Leopard on my Late 2013 Retina MBP, but I would expect some form of backward compatibility between the previous version and it successor. Apparently this is not possible, and how is this even acceptable?
Personally, I am not going to downgrade, as if I had a choice, but I would and I expected however, the possibility to at least download the previous OSX version. What do you do if you have bought several applications, not necessarily online from App Store and buy yourself a new Mac with preinstalled Mavericks and after installing your "old" applications they fail to work properly? What do you do since downgrading apparently is not an option. So... again, what do you do?
If you don't have friends with an older Mac, you could be facing serious problems. And I'm not talking about gaming, but serious business.
I find this quite disturbing actually, and please tell me it's not so. There gotta be a way to do this?
I simply want to download the OS but I expect some registry values (like windows' registry) keeps preventing this.
It should be possible to simply download and not download and install in one operation, shouldn't it?
Regards

ITunes 10.7 won't install on my Macbook Pro which is running OSX Mountain Lion

Hi,
I've been trying all day to get my iPhone 5 to connect to my iTunes so I can sync my music etc.
First thing, when I connected to my MacBook Pro it says "The iPhone “David's iPhone” cannot be used because it requires iTunes version 10.7 or later. Go to www.itunes.com to download the latest version of iTunes."
So I downloaded iTunes 10.7 but when I attempt to install it I get "The installation failed. The Installer encountered an error that caused the installation to fail."
I am on OSX Mountain Lion 10.8.
Can anyone suggest what I might have to do to get this to work? I've even attempted to download OSX Update 10.8.2 but I get the same installation error.
Can someone please help!
Thanks

It could be a transient problem with the network or the server that fixes itself after some time for no apparent reason. It may just work if you try again later.
Also, go to Apple Menu > System Preferences > Network, choose Network Port Configurations from the Show popup menu, and make sure that the configuration used to connect to Internet appears at the top of the list.

I am installing Adobe Acrobat on a Mac with OSx Mountain Lion - gives me this error DW006 any ideas?

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ERROR: DW006: Apple Package failed to install successfully.
ERROR: DW050: The following payload errors were found during install:
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No there is not enough information in this snipped of your installation log. Please see Troubleshoot with install logs | CS5, CS5.5, CS6 - http://helpx.adobe.com/creative-suite/kb/troubleshoot-install-logs-cs5-cs5.html for information on how to review the installation log in it's entirety.

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Hello all,
I have an air app/badge install setup. The badge install is very significant because it passes data from browser to the air app. Recently the app is being blocked on OSX Mountain Lion, and up, due to GateKeeper restrictions which flags it as "from an unknown developer". This is because the app is not signed with Apple's "Developer ID Application" certificate. I bought the cert from Apple and now I am stuck on how to sign the .air app with it. I did try to export it to p12, and was able to sign it, but the app fails to install and has the famous errorID 5022 and the app exits with code 7. There are no other installation of the same app on the system, and signing it with another cert works but its blocked by gatekeeper in the badge installation process.
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The SSD will boot fast, but the real change is launching 10 programs in 10 seconds and being able to use them. (20 seconds for a few big suites).
I would not add or upgrade to 32GB RAM. You can get 8 x 2GB for $100 on Amazon.
Those 250GB HDD are "old" and slow and overdue to be replaced, reformat and use t o backup the system.
Samsung 250GB SSD is down to $150 or so on Amazon also.
The 5770 is gone, hard to find, EOL and over charged for when you do find one.
you could look into how to use a PC 6870 or others.
Or, you could hold out and wait for a refresh of Mac-Mini which can be just as fast or faster and run Mavericks.

OSX Mountain Lion fails to install on 2009/2010 MacPro

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