I too am having this problem. I have the model from March 2011 and I installed OS Mountain Lion while I was sleeping only to wake up and see the ssame message about restarting.
Has anyone came up with a fix for this? Because I can not do a clean install without a backup disk. In addition, I have reset both my PRAM and my SMC.
Your help is greatly appreciated!
I've got an iMac late 2009. Same problem.
Another bug I ran into last night while dealing with this was that when I booted to the recovery partition, I tried clicking "reinstall OS X" and got an error. It wouldn't even do that!
So I restored from backup instead of dealing with it. Maybe I'll give it another go tonight. Hopefully there's a good answer!
Yes, I've made sure of it before the initial install. It was even verified from apple after the second install from recovery HD. I'm going to take it to the apple store later today. My apple care is up, but I think they should be able to help, especially since I just bought this from them and they are at fault.
Try running a hardware test
Note: Be sure to disconnect any external devices, printers, hard drives, scanners, and so on (other than the Apple keyboard and mouse) from your Apple computer before starting up to Apple Hardware Test and running the diagnostic.
To start up your computer in Apple Hardware Test:
Press the power button to turn on your computer.
Press and hold the D key before the gray startup screen appears. If Apple Hardware Test does not start up, see the Additional Information section at the end of this article.
Note: Some Macintosh computers that shipped with OS X Lion support the use of Apple Hardware Test over the Internet. These computers will start up to an Internet-based version of AHT if the hard drive does not contain AHT. An Internet-enabled connection via Ethernet or Wi-Fi is required to use this feature.
It takes a minute or so for Apple Hardware Test to start up and inspect your hardware configuration. While this is taking place, an icon appears on the screen:
When the process is complete, select your language and click the right arrow. If you aren't using a mouse, you can use the up and down arrows to select a language and then press the Return key.
The Apple Hardware Test console appears. You can choose which sort of test or tests to perform:
To perform all of the basic tests, click the Test button or press the "T" key or the Return key.
To perform a more thorough diagnostic test, select the "Perform extended testing" checkbox under the Test button before you click the Test button.
Your test results will appear in the window in the bottom-right of the console.
To exit AHT, click Restart or Shut Down at the bottom of the window.
Apple Hardware Test is included on the DVDs that are shipped with some Macintosh computers. If the copy on your hard drive becomes unavailable, use the DVDs to run Apple Hardware Test.
For Intel-based Apple computers that shipped with Mac OS X v10.5.4 or earlier, Apple Hardware Test is located on the Mac OS X Install Disc 1 and should be included with your computer.
For Apple computers that shipped with Mac OS X v10.5.5 to 10.6.7, Apple Hardware Test is located on the Applications Install Disc 2 and should be included with your computer.
For some Apple computers that shipped with OS X Lion, if Apple Hardware Test cannot be found on the hard drive, an Internet-based version starts up instead. An Internet-enabled connection via ethernet or Wi-Fi is required to use this feature. Some computers that shipped with Lion require a software update to use this feature. See Computers that can be upgraded to use Lion Internet Recovery for more information.
Learn about the language availability of AHT.
The Hardware Profile tab of AHT provides specific information about your computer. To see this information, click the tab, then select a subject area on the left.
I too am having the exact same problem, I guess I should have listened to my spideysense saying don't be the first one to upgrade. I have been on these threads all day and have tried everything, not making any money today....
1. I have the latest and greatest 2 month old MacPro tower, 12 processors, upgraded videocards, 24 gigs of RAM, etc, etc. so I am ruling out a hadware deficiency
2. I tried the Option - R reboot, ran permissions, fixed one permission, same problem, constant re-boot, on it's own
3. I tried the PRAM reset, actually two or three times, same problem, constant re-boot, on it's own
4. I tried the Safe Mode reboot, same problem, constant re-boot, on it's own
5. I didn't set up a Time Machine yet so I couldn't try that.
6. I removed any and all unecessary peripherals, only used the one monitor, got in safe mode and turned off the Wi-Fi. same problem, constant re-boot, on it's own
7. My last option is to reboot with Option - R and re-download and reinstall ML but our office internet is having issues and it says it will take 14 hours to re-download, any other possible solutions out there ?
OK, this solved most of my issues - and it worked for me, but I make no claims that it will fix your issue. I'm on a late 2008 unibody MacBook Pro 15 running Lion before upgrade with an aftermarket Crucial SSD as my main hard drive.
First, make very sure you have a full external backup of your working Lion HD on a different disk or partition. I used Carbon Copy Cloner to do mine. If you can't do this, I wouldn't proceed further. If you do, do a Command-R at startup to boot into recovery, erase your working hard drive, then reboot. Command-R again and do a clean Mountain Lion install onto your (now erased) HD. This will take a few hours. When done, you'll have a stock Mountain Lion install. Go through the startup steps, and make sure to create a main user that does not conflict with any of your old user accounts. After you log in, open Migration Assistant and select "from disk", pick your external Lion backup, and choose to migrate just your old account(s) to the current install (meaning, don't select anything else like "applications", "settings", or "other files"). This took about an hour for me, and copied over a bunch of files. When done, make sure the old "main" user account you migrated over has admin rights, then log out and log in as your old account. Things will look familiar, with some question marks in the dock (in place of apps you haven't migrated over yet). You can optionally delete the new account you created at Mountain Lion setup now. Go back to Migration Assistant, select "from disk" and pick the old Lion backup again, and this time choose to migrate just your old applications. This took another hour or so for me. When done, you'll have all your apps, and can click on the dock "question marks" to re-establish the app icons. (If that doesn't work, remove the old question marks from the dock and drag the necessary apps back in.). Note: this will not include any apps you've downloaded from the App Store; those will have to be redownloaded using the App Store app.
I stopped here, because when I did a full migration, something in either "old files" or "settings" triggered the reboot loop and I had to start over. This was close enough for me to proceed with getting Mountain Lion set up the rest of the way.