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How to upgrade to MacOS High sierra for IMac min 2011 ?

How to upgrade to macOS High sierra for iMac min 2011 ?

iMac 21.5″, OS X 10.11

Posted on Oct 1, 2021 4:03 AM

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Question marked as Top-ranking reply

Posted on Oct 1, 2021 4:26 AM

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.


And this Mac Mini of 2011 can and does work will with High Sierra if it has a SSD Drive. Have one myself with a 500GD SSD and upgraded to 8 GB RAM and it is fast.


With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install. Make sure to use Only Safari to commence the download as Others may not work.



Make a Time Machine Backup Before attempting.


Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation

3 replies
Question marked as Top-ranking reply

Oct 1, 2021 4:26 AM in response to mymarcus

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.


And this Mac Mini of 2011 can and does work will with High Sierra if it has a SSD Drive. Have one myself with a 500GD SSD and upgraded to 8 GB RAM and it is fast.


With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install. Make sure to use Only Safari to commence the download as Others may not work.



Make a Time Machine Backup Before attempting.


Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation

Oct 4, 2021 6:35 AM in response to mymarcus

How to get old versions of macOS

If your Mac isn't compatible with the latest macOS, you might still be able to upgrade to an earlier macOS, such as macOS Catalina, Mojave, High Sierra, Sierra, or El Capitan.


Helpful articles

To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

Check compatibility

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier.

If a macOS can't be used on your Mac, the App Store or installer will let you know. For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS. To confirm compatibility before downloading, check the minimum hardware requirements:

 


Download macOS using Safari on your Mac

Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically.

Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

Published Date: June 11, 2021

How to upgrade to MacOS High sierra for IMac min 2011 ?

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