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I just bought a 2010 Imac and it has Snow Leopard on it currently. I need to put Mountian Lion on it so I then can upgrade to High Sierra. Do you guy have a link that I can download Mountain Lion?
iMac Pro
Sorry to have misdirected you. It may be that attempting to jump directly to Yosemite was premature.
Let's try this:
-> Delete the previously downloaded InstallMacOSX.dmg and empty the trash.
-> Start at the Apple menu > Software Update. Install any available updates for Snow Leopard, then restart your iMac.
-> Follow this link to download and Upgrade to OS X El Capitan - Apple
Once the upgrade to El Capitan is complete I think now you'll be set to upgrade to High Sierra.
-> Follow this link to download and Upgrade to macOS High Sierra - Apple
Sorry to have misdirected you. It may be that attempting to jump directly to Yosemite was premature.
Let's try this:
-> Delete the previously downloaded InstallMacOSX.dmg and empty the trash.
-> Start at the Apple menu > Software Update. Install any available updates for Snow Leopard, then restart your iMac.
-> Follow this link to download and Upgrade to OS X El Capitan - Apple
Once the upgrade to El Capitan is complete I think now you'll be set to upgrade to High Sierra.
-> Follow this link to download and Upgrade to macOS High Sierra - Apple
I see that we are on the same page. Unfortunately I am unsure what the hang up is in this case and am at a loss as to how to proceed from this point. As I see it you are following the instructions as presented in the support docs and I felt sure that the combination of available downloads would have been enough to get you to your destination here. You might try once more to download a fresh copy of 10.11 El Capitan after first deleting the current download.
You have the links to the Apple Support documents detailing how to upgrade from Snow Leopard to El Capitan. And I believe your iMac meets the requirements for the upgrade.
It may be that your original thoughts to download Mountain Lion and begin your upgrade from there were smack on target.
To that end, I've collected this link to the Mac OS X Mountain Lion retail purchase and download from the Apple Store.
I hope this will resolve the issue.
I apologize if my attempts to help have wasted your time.
If I have missed something I hope someone else will jump in here and offer a suggestion.
edit - You might try a restart in safe mode and let the iMac do cache cleaning and housekeeping. Perhaps attempt the install while in safe mode and see if that is successful. If not, reboot normally and try again.
Use safe mode to isolate issues with you Mac - Apple Support
Start here with How to upgrade to OS X Yosemite - Apple Support
From there I believe you may be able to upgrade to High Sierra via the Mac App Store.
Thanks, that helped. Now I downloaded the Yosemite and when I clicked on the file called "InstallMacOSX.dmg" it came up with "Warning. The following disk images couldn't be opened." You'll have to pardon my not knowing much about Mac. I have never had a Mac computer before. Thanks for all your help!
That is the downloaded installer for Mac OS X 10.11El Capitan?
Did you first attempt to install any updates that are available for Snow Leopard?
You should be running 10.6.8 and there should be no additional security updates.
Thanks for all your time man. You spent a lot of time helping me out and I really appreciate all you did. I will try to Mountain Lion download to see if I can get it to work. Thanks again and I’ll let you know if I get something to work.
It is saying the same exact thing... not sure what I’m doing wrong. I deleted the Yosemite and deleted it from trash. Also I restarted the Mac.
Thanks again for your help, I will give this a try in the morning and let you know how everything goes!
You're welcome.
Again, I apologize for the miscue, but I think we're on the right track now.
I look forward to hearing that all is well.
The download I used was the 10.11 EL Capitan. I did install all updates available before trying to install El Capitan. Also the IMac says it is running is 10.6.8
in my last message I meant to say 10.11 El Capitan. —- I was able to edit my post.
Updating from Snow Leopard to High Sierra on my 2010 Imac.
