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How do I upgrade from Sierra 10.12.6 to latest version of Catalina

I am trying to upgrade from Sierra 10.12.6 to Catalina (in a hurry but, of course!) and when I go to Apple store, all I can see are what look to be bolt ons which are charged extra. There doesn't appear to be an update waiting in the wings of my MacAir (or I'm not looking in the right area). Help - and not too technical, please :-)


MacBook Air 13″, macOS 10.12

Posted on Mar 30, 2022 1:21 PM

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Question marked as Top-ranking reply

Posted on Mar 31, 2022 2:45 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.


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


Safari will open a redirect and open the Apple Store where the download can commence.


macOS Catalina 10.15 hardware requirements


macOS Mojave 10.14 hardware requirements


macOS High Sierra 10.13 hardware requirements


If this is a Production or Mission Critical Set-up - a more prudent and measure approach is suggested. 


The above is from observations on the Apple Support Community Forums and IMHO


Make Time Machine Backup  is very useful and can be used to Revert to Previous Working macOS


Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina, Big Sur & Monterey supports only 64 bit and there is no workaround.


Suggest using Go64 to find 32 bit application before attempting the upGrade. Some or many of the Application already installed may required update or upGrades to 64 Bit Versions.

2 replies
Question marked as Top-ranking reply

Mar 31, 2022 2:45 AM in response to MacWasplett

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.


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


Safari will open a redirect and open the Apple Store where the download can commence.


macOS Catalina 10.15 hardware requirements


macOS Mojave 10.14 hardware requirements


macOS High Sierra 10.13 hardware requirements


If this is a Production or Mission Critical Set-up - a more prudent and measure approach is suggested. 


The above is from observations on the Apple Support Community Forums and IMHO


Make Time Machine Backup  is very useful and can be used to Revert to Previous Working macOS


Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina, Big Sur & Monterey supports only 64 bit and there is no workaround.


Suggest using Go64 to find 32 bit application before attempting the upGrade. Some or many of the Application already installed may required update or upGrades to 64 Bit Versions.

How do I upgrade from Sierra 10.12.6 to latest version of Catalina

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