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Model A1419 / Late 2013 / 3.2 & 3.4 GHz Core i5 or 3.5 GHz Core i7 Processor, ID iMac14,2

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After crucial upgrade my iMac will not!

I upgraded my iMac from old HD not working to iFixit crucial kit. I followed every little instruction, heat sensor, etc. My iMac had to be booted up in download recovery. From the internet it installed the original OSX it came with. It seems to boot up just fine like a new computer. I had to enter in my Apple ID and set it up as new. I do not have any time machine backups… so I was just going to reinstall everything.

But when I clicked available updates for OS it started to download and failed every time. It will not update. I wiped the hard drive clean again and formatted it mac journaled and redownloaded original install again (apple will only let you recover OS the computer came with…. after OSX install IT WOULD NOT UPGRADE AGAIN.

HELP….how do I get a Crucial 1TB upgrade to install OS and then upgrade back to a least Mojave?

thank you!

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You are facing two issues here!

The first is the original OS your system had used an older version of file system (HFS+) from High Sierra onward a new file system was introduced (APFS). So while you can get your system to download and install OS-X Mountain Lion (10.8.4). You first need to get it to get to Sierra which frankly is as high as I would go if you are just using a SATA drive. If you have a PCIe drive then going to macOS Catalina 10.15.7 is as far as you can go.

So how to get to Serra macOS 10.12?

You’ll first need to manually down load the OS installer from here How to get old versions of macOS. Then you’ll need to make a bootable OS installer thumb drive. Using your current systems Disk Utility format the USB drive to GUID with a journaled file system (HFS+) then follow this guide How to create a bootable macOS Sierra installer drive

Again, I do strongly recommend sticking with Sierra if you only have the SATA SSD in your system. If you have a PCIe SSD installed then you could move up to Catalina making the PCIe your boot drive running APFS and leave the SATA drive with HFS+

If you want to get to Catalina download the OS like you just did with Sierra (after first getting to it) and follow this guide How to create a bootable macOS Catalina installer drive

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Okay, it took a lot of trial and error. But I finally figured out after my iMac reset to the original OS as that's the only thing that allow you to do after you install the SSD unless you made a clone copy of your hard drive or were able to before you installed the new SSD.

The solution was to do a internet rescue for the original hard drive then go to this site: and download each OS you want to upgrade your new SSD to. Download each “patcher" app and read instructions as the app will download full version from Apple. Upgrade by order. Meaning use the oldest OS then upgrade again and again until you have Catalina. Then Catalina will do a final update from Apple through your Settings > Software Updates on your MAC. This works perfectly and makes the new Cruical SSD accept all OS upgrades. Apple obviously has put in the cose it doesn't like people doing self repairs and tries to block you from updating OS BUT.THIS SOLUTION SOLVES THAT!

PLEASE NOTE: you are using the Patcher from the Above website for each OS you want to download. You're only using it for the download from Apple so you can get a full copy easily. When it downloads put the new full version of the OS on your desktop. Do not patch it as the software is originally used to do. I repeat do not patch through the Patcher only use it to download the full versions. After you have the full version on your desktop you can double-click on it and it'll upgrade your OS just like any other time. You do not have to put it on a USB or external disk to boot up on. Just click on it and let it upgrade your machine. Just remember don't patch the OS you want to install each OS in order right from your desktop until you get to Catalina. Then update Catalina from your settings app.


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Patrick OKelley sarà eternamente grato.
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