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how to update from Mojave to Catalina

how to update from Mojave to Catalina

Posted on Oct 30, 2021 4:52 PM

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Question marked as Top-ranking reply

Posted on Oct 30, 2021 5:16 PM

❗️ Do NOT upgrade until you have made a Time Machine or other backup of your startup drive.

Learn How to Back up your Mac with Time Machine


How to Upgrade  macOS:

The macOS version you can upgrade to depends on the year your Mac was released.

Click the  (Apple) menu at the top left of your screen and choose About This Mac.


Check the Compatibility of your Mac with newer versions of macOS:

➡️ macOS 10.15 Catalina is compatible with the Macs listed here


❗️IMPORTANT – Your 32-bit apps won’t work in Catalina, Big Sur or Monterey.

https://support.apple.com/en-us/HT208436

Use this free utility to check the compatibility of your apps:

Go64: https://www.stclairsoft.com/Go64/


✅ - IF your Mac is compatible, then using Safari only, download the macOS upgrade installer app:

Click > Catalina.

Once downloaded, double-click the “Install macOS [version]” app in the Applications folder to begin the upgrade.

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Question marked as Top-ranking reply

Oct 30, 2021 5:16 PM in response to Tymama

❗️ Do NOT upgrade until you have made a Time Machine or other backup of your startup drive.

Learn How to Back up your Mac with Time Machine


How to Upgrade  macOS:

The macOS version you can upgrade to depends on the year your Mac was released.

Click the  (Apple) menu at the top left of your screen and choose About This Mac.


Check the Compatibility of your Mac with newer versions of macOS:

➡️ macOS 10.15 Catalina is compatible with the Macs listed here


❗️IMPORTANT – Your 32-bit apps won’t work in Catalina, Big Sur or Monterey.

https://support.apple.com/en-us/HT208436

Use this free utility to check the compatibility of your apps:

Go64: https://www.stclairsoft.com/Go64/


✅ - IF your Mac is compatible, then using Safari only, download the macOS upgrade installer app:

Click > Catalina.

Once downloaded, double-click the “Install macOS [version]” app in the Applications folder to begin the upgrade.

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Oct 31, 2021 2:03 AM in response to Tymama

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.


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.


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

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how to update from Mojave to Catalina

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