Upgrade from snow leopard 10.6.8 to montain lion on a iMac system won't boot getting a crossed out circle

Clean install OS.10.6.8 update it completly. May be you ignored some firmware update.
I have two incedents.
My thunderbolt port stopped working after upgrading to ML 10.8. I booted from external 10.6 , 10.7 still didnt work. Then i clean installed 10.6.8 and ran software update it updated the thunderbolt firmware and all is well now. This firmware update for some reason didnt show up in ML 10.8.
Secondly , when i upgraded my Brother's Macbook from 10.5 to 10.6.3 it would install but stuck with crossed out circle. Then i downgraded checked for update found an efi update , then the 10.6.3 worked fine.

Similar Messages

Can I upgrade from snow leopard 10.6.8 to mountain lion? Not sure how old my MacBook is. How can I find that information?

Can I upgrade from snow leopard 10.6.8 to mountain lion on my MacBook?

Choose About this Mac from the Apple menu, click on More Info, and compare the model identifier with MacBook5,1, which is the earliest MacBook that can run Mountain Lion and newer.
A MacBook older than that which has a Core 2 Duo(not Core Duo) or better CPU and at least 2GB of RAM can run Lion 10.7, which is available by clicking here. Neither Mountain Lion nor Lion support PowerPC software such as Microsoft Office 2004.
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If I upgrade from Snow Leopard 10.6.8 to Mountain Lion, will I lose Microsoft Office and iMovie?

If I upgrade from Snow Leopard 10.6.8 to Mountain Lion, will I lose Microsoft Office and iMovie?

Check to make sure your applications are compatible. PowerPC applications are no longer supported.
Application Compatibility

Upgrading from Snow Leopard (10.6.8) to Mountain Lion

So I purchased Mountain Lion online and received the redeem code from Apple. I've redeemed the download for Mountain Lion but have been having issues trying to even initiate the download. I've gone into system preferences and turned off the computer's sleep mode to prevent the computer from going to sleep during the download. When I click download, the App Store seems to load for a second and then it just goes back to saying download (as if I never pressed the button, or at least that's what it looks like). I have gotten it to start downloading once (as indicated by the icon that appeared in my dock), but about mid-way through it failed and said I had to retry.
I'm upgrading from Snow Leopard (v10.6.8) so I don't have launchpad. I'm also limited in my ability to get fast internet (I have to go to a coffee shop to get decent internet where I live). So I guess a couple questions:
1. Is there a minimum internet speed requirement for downloading Mountain Lion? (If not, I'm willing to wait at the coffee shop even if it takes a while)
2. If it isn't necessarily an internet speed issue, could it possibly be downloading somewhere where I can't see it download? (although I this seems unlikely as I have had the download appear in my dock on at least one occassion)
3. Is there anything else on my end that might be causing issues with the download that anyone can think of? (I've called apple a couple of times already so I just wanna make sure there isn't anything glaring that I might be missing before I try to call them again)
If there is any other info that might help diagnose the situation, let me know and I'll try to describe what's happening on my end
Thanks!

Yeah, that's pretty much what I have (1.5 MBps down and up). The connection isn't consistent though (it drops and reconnects on an inconsistent basis). I guess the problem I'm having is getting the download to even initiate, which has, to my knowledge, only happened once (this morning). I go back to school on Wednesday where I have a 10 MBps down and up connection. Trying to get this done as soon as possible with school starting up again next week to try and make sure everything is up and running smoothly.

HT4759 can I upgrade from snow leopard to current version of Mountain Lion on my Mac? So I can use icloud on all devices?

Can I upgrade from Snow Leopard - OS X 10.6 - on my current Mac to Mountain Lion - OS X 10.8.2? Or even up into IOS?

Welcome to the Apple Support Communities
As your Mac is running Mac OS X 10.6, first open  > Software Update and install Mac OS X 10.6.8. This update will add the App Store, so open it and try purchasing Mountain Lion. If your Mac is compatible, the computer will start downloading Mountain Lion.
While your Mac is downloading Mountain Lion, you should make a backup of your files. Also, check if your apps are supported > http://www.roaringapps.com
If your Mac isn't compatible with Mountain Lion, see if you can use OS X Lion > http://support.apple.com/kb/HT4949 If it's compatible, call Apple to purchase Lion > http://support.apple.com/kb/HE57

Problem upgrading from snow leopard 10.6.8 to mountain lion. Damaged partition.

Hi, here's my problem: I can't install ML and I can't go back to SL.
This is the story:
- trying to install ML on my iMac SL 10.6.8 > error: HDD is damaged and can't be repaired.
- trying to start up from original SL install disk to return to the original state > error: the contents of this disk can't be changed
- trying to start up from 'start up disk HD osx 10.6.8' > error: you can't change the start up disk, start up disk couldn't gather enough information.
- trying to start up in safe mode > the grey screen with the apple appears but nothing happens except that the computer runs warm.
- using disk utilities:
     -- first aid: verify disk: error: disc needs to be repaired. Click repair disk. // (but the repair disk button stays grey and can't be clicked.)
     -- restore: when opening the time machine back up there are just files, no disk images or something like that.
     -- erase: error: couldn't unmount the disk. // (probably because you can't erase a partition you are already using).
That about sums it up. All this is leaving me with a useless iMac.
We can't have that, can we?
Please help. Thanks.

Thanks Walter.
I just solved the problem myself. Here's what I did:
I used the 10.6.8 install disk to start the computer, in disk utilities I unmounted the partition with my OS ( HD MacIntosh ). Then I could erase the partition (I have up to date back ups of my files). After that I could install 10.6.8 again. After it is installed completely and I have run the apple software update I expect that installing ML won't be a problem anymore.
I advise anyone encountering the same problems to have a look at the posts in this community concerning the upgrade from snow leapard to lion because the same problems, and a lot of them, occured with this. Which, I think, is a sad thing.
Minus points for Apple.

Cannot upgrade from Snow Leopard to Yosemite

I have a MacBook from late 2009 with 4 GB memory and plenty of hard disk space. When I attempt to upgrade to Yosemite via the App store it says "This version of OS X 10.10 cannot be installed on this computer". Even though the computer was purchased new at the end of 2009, is it possible it does not meet the hardware specs somehow? Am I doing something wrong? Thanks in advance.

I'm having a similar (related?) problem with a 2009 MacBook. The upgrade from Snow Leopard to Yosemite started off normally, but the installation is not working - progress bar gets about halfway and then stops...for days.
A guy at the Genius Bar told me that happens sometimes if there's a blip in the internet connection during the process. Apparently, the resolution is to wipe the drive and reinstall. Unfortunately, I didn't back up the drive prior to the installation thinking this was just one of those upgrades that the OS or various apps (e.g. iTunes, iPhoto, etc.) always want me to install, which I do, never having had a problem.
Although, the Genius tested the drive and found it to be in perfect condition, I was told that I need to go to an external company to have the data recovered because Apple doesn't do data recovery.
Is it true that I have to wipe the disc and start fresh? I have the original Snow Leopard disc, so can I simply reinstall Snow Leopard? When I hold down the option key on power up, it shows me two images - Macintosh HD and Recovery- 10.10. Should I try Recovery- 10.10?
I would appreciate any thoughts, suggestions, ideas, alternatives, etc.

Upgrade from Snow Leopard to Mountain Lion erase my Windows partition?

Dear all,
I know some one might have asked it but I just wanna re-confirm.
Would the upgrade from Snow Leopard to Mountain Lion erase my Windows partition? I am currently using Bootcamp on my Macbook Pro (Late 2010 Version) and I do not have parallel desktop. I asked the same question when Lion was released, but HK Apple Store said YES and Melbourne Apple Store said no. I am a bit confused now.
Thank you for answering. Cheers!

Nothing.
That said, you should ALWAYS have a backup as anything can happen at anytime.

System freezes when attempting to upgrade from Snow Leopard to Lion

I hope someone can help me out there. I have downloaded the Lion upgrade install program and built an install disk on my jump drive using Lion Diskmaker 2.0.2, but when I tried to upgrade from Snow Leopard to Lion using the jump drive, the install freezes at 24% and I cannot reboot or anything. It just keeps coming back to the install screen. Any suggestions?

This could be due to a number of causes. If you have the Lion installer application, then I suggest you put it in your Downloads folder. Now do this:
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.
When you've done the above you should now double-click on the Lion installer application in your Applications folder. When prompted click on the Install button. Note that you will not use the flash drive you made as you shouldn't need it. And, this will avoid any issues with a bad flash drive installer.

I am new to mac's and have upgrade from Snow Leopard to Lion but......

I am new to mac's and have upgrade from Snow Leopard to Lion but not all my application will work. Is it save to reinstall using original snow leopard dvd and does it wipe all my other application like apature? I am in a panic over this, any help!!
I came across this online and i want to know is it safe to do this:
Backup your User folders to an external drive. This should preserve your documents, photos, music, etc. If you store those things in locations not in the User folder, make sure to copy those over too.
Insert the Snow Leopard disc. Restart your Mac and hold down C to boot to your DVD drive.
Go to Utilities in the menu bar once the installer pops up and select “Disk Utility.”
Find the drive in the sidebar where Lion is installed, select it and navigate to the Partition tab.
Click on the drop down menu under Partition Layout and select “1 Partition.” Hit Apply.
Now navigate to the Erase tab and make sure “Mac OS Extended (Journaled)” is selected, then hit Erase to delete all data on the drive.
Quit Disk Utility to get back to the Snow Leopard installer and proceed with the install.
Restore your User folder and documents from your backup.
Run Software Update to get everything current, install your apps from your original install media and update those as well.
if any one can help me that would be great, thanks Mike

Before you do that why not do this first:
Repair the Hard Drive and Permissions
Boot from your Lion Recovery HD. When the recovery menu appears select Disk Utility. 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 main menu.
To boot from the Recovery HD restart the computer. After the chime hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
If this doesn't help, then you can proceed to reinstall Snow Leopard as follows:
Downgrade Lion to Snow Leopard
1. 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.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Quit DU and return to the installer. Install Snow Leopard.
This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard. I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
This will erase the drive so be sure to backup your files before doing this.

!!!HI, SO I BOUGHT MOUNTAIN LION ON MY MACBOOK PRO TRYING TO UPGRADE FROM SNOW LEOPARD, AND WHILE TRYING TO REINSTALL THE OS SETUP AS IT SHOWED IT COULDNT BE VERIFIED, I CROSSED OUT MOUNTAIN LION FROM MY PURCHASES, ITS NOW GONE, DO I HAVE TO BUY IT AGAIN?

HI, SO I BOUGHT MOUNTAIN LION ON MY MACBOOK PRO TRYING TO UPGRADE FROM SNOW LEOPARD, AND WHILE TRYING TO REINSTALL THE OS SETUP AS IT SHOWED IT COULDNT BE VERIFIED, I CROSSED OUT MOUNTAIN LION FROM MY PURCHASES, ITS NOW GONE, DO I HAVE TO BUY IT AGAIN?

Please google search for "Mountain Lion disk crash" before upgrading you mac pro. You might need to replace you Mac hard drive after the upgrade.So many people had the same problems including me.
Be aware of the Mountain Lion upgrade problem.

Search in finder doesn't find my files in OS 10.8, upgrade from snow Leopard to Mountain Lion

after i upgraded from snow leopard to mountain lion . when i try too search files on finder . it does not find any of them although all the files are still there .so i need scroll up and down for few minutes to find my file manually . what could be the problem ?? anyone can help me with this .. thanks in advance

Hmm... didn't help me. But, I'm glad to know that I can "refresh" the search profiles. That may come in handy in the future.
I'm having similar problems where I can see a file from within an application, but the file doesn't show up in a Finder search. The file I see in the application also isn't visible in that application's folder (where it's supposed to be stored, in this case).
The file exists, because I'm able to work on it from within the application. However, it can't be found on the computer by any means I have available. I've spoken with the manufacturer of the software and they told me where to look for the file, but it isn't there (as far as I can see). Of course, they suggest the Finder is "broken" and needs to be fixed. I don't think that's the case. I can easily find other files without difficulty.
Could what I'm looking for be a "hidden" file?

I have a big problem with Lion and PGP. After upgrading from snow leopard to lion I cannot access my PGP drive which was generated under snow leopard. PGP does not start but gives a notion that lion cannot work with my PGP version. Solution?

After upgrading from Snow Leopard to Lion I cannot access a PGP drive which was generated under snow leopard. PGP does not start. When I try to start I just receive a message that Lion cannot work with PGP. How can I now access important and confifential informatio which I have stored in PGP (snow leopard). Do I have to move back to snow leopard. If so, how can I do this?

If you have this product,
http://www.symantec.com/business/support/index?page=content&id=TECH165159
you have to go back to Snow Leopard.
To re-install SL, back up your home directory, format and re-install.

I want to upgrade to Lightroom 5, but I'm concerned about compatibility with my 2008 intel Core 2 Duo iMac with only 4G of Ram. Will I be able to run Lighroom 5 if I upgrade from Snow Leopard to Lion?

I want to upgrade to Lightroom 5, but I'm concerned about compatibility with my 2008 intel Core 2 Duo iMac with only 4G of Ram. Will I be able to run Lightroom 5 okay if I upgrade from Snow Leopard to Lion? What will happen to the applications that aren't 64-bit compatible? Also the Eye-one Display 2 colorimeter to calibrate the monitor will not run on Lion, so that will be an expensive upgrade to an i1DisplayPro. Is the upgrade important enough to offset the expense? I have an Epson R2000 printer. Will there be problems with the drivers if I upgrade to Lion? It would be great to hear from other mac users who are also photographers and who print their own photos.

Before upgrading to Lion be sure to read this link:
https://discussions.apple.com/docs/DOC-6271
Adobe lists these requirements:
http://www.adobe.com/products/photoshop-lightroom/tech-specs.html
Looking at http://www.everymac.com/ even the earliest 2008 iMac was fully 64 bit, even though Boot Camp doesn't support 64 bit Windows on that machine.

Mavericks upgrade from Snow Leopard broke boot camp. Help!

Since Apple made the newest version of OS X free, I decided to upgrade my 2010 MacBookPro from Snow Leopard. The installation seemed to go fine, but after the installation, I can't boot into my Bootcamp / Windows partition. From what I have read so far, others have experienced this issue upgrading from Snow Leopard to Mountain Lion because the recovery partition apparently messes up something fragile between the MBR (Master Boot Record) and the GPT (GUID Partition Table). I'm not sure if that's what's going wrong here or not.
When I attempt to repair /dev/disk0s4 via the GUI Disk Utility, I get the following details:
Verify and Repair volume “disk0s4”
Checking file system** /dev/disk0s4
Invalid BS_jmpBoot in boot block: 6e0020
Volume repair complete.Updating boot support partitions for the volume as required.
Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Here's a screen shot:
http://imgur.com/6XLYMOM
Well, I can't mount the partition to copy off my files, and I just want to be able to go back to using my windows partition normally. So I started Googling and found several different threads, but so far I'm a few hours into trying to get my system back, without a clue as to what the right fix is.
Upgrading the OS on one partition of a HDD shouldn't completely break another partition. Is my case just a freak accident, or is this a serious flaw in the upgrade process? Sifting through 250GB of data (1/2 my laptop drive) is going to take some of these tools a while... I'm not a happy customer today.
Aside from spending upwards of 12 hours reinstalling Windows and the dozens of other applications and data files from backups and recovering all the files that I can, does anyone know of any tools that can recover the lost partition should I find it? I'm going to leave testdisk running over the disk while I sleep to try and find filesystems.

I had Windows 7 64-bit installed, but the version is irrelevant. The problem here is that *something* Apple's installer did damaged my working computer. The fact that it damaged others as well and apparently hasn't been fixed since the release of Mountain Lion is very disappointing. Boot camp is a supported Apple product, and we pay a premium for Apple's computers so we should expect better than for an upgrade to blithely destroy our data and tools leaving us to spend days restoring. That's no upgrade. It's a minefield. I'm happy if some good comes from my sharing and it helps others make better decisions than to trust the installer not to screw up their week. Make sure you back up your whole disk image before installing. The upgrade is only free if your time is worthless.
I'm still looking for an easy fix to this problem. The disk scanning software I'm running now is taking a long time to search through the 500GB HDD for information. I fear that the addition of the recovery partition wiped out my NTFS partition's file system entirely. It's inevitable that I haven't backed up all my stuff and that I have lost some amount of data in addition to my time.

Upgrade from snow leopard 10.6.8 to montain lion on a iMac system won't boot getting a crossed out circle

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