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How to upgrade my OS X 10.9.5(13F1911) to latest Mac Os ?

How to upgrade my OS X 10.9.5(13F1911) to latest Mac Os ?

iPhone 12 mini, iOS 14

Posted on Apr 21, 2021 10:42 PM

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Question marked as Top-ranking reply

Posted on Apr 21, 2021 10:51 PM

Back up your data, check your applications for compatibility, and depending on which Mac model you have, click on El Capitan, High Sierra, Mojave, Catalina, or Big Sur.


(196636)

2 replies

May 24, 2021 7:47 AM in response to pkulk1603

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. Make sure to use Only Safari to commence the download as Other may not work


Make a Time Machine Backup Before attempting. Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina and Big Sur Only support 64 bit and there is not workaround.


Are there any AntiVirus, Disk Cleaner, Optimizers, Defrag, VPNs 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.

How to upgrade my OS X 10.9.5(13F1911) to latest Mac Os ?

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