Mac OS update from High Sierra to Catalina

Aether_mik Said:

"Mac OS update from High Sierra to Catalina: hi. I'm new to Mac OS and I cannot find Mac OS Catalina in App Store. I tried to download it from this site but with no luck, it says an error :this requires Mac OS 10.15. Right now I'm running 10.13 and I'm confused what to do. please help"

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Confirm Compatibility:

First Off, what is your Year/Model of your Mac?

1. Go to: Apple menu
2. Select: About this Mac
3. View: Third Line-Down

See if it is mentioned here: macOS Catalina is Compatible with these Computers - Apple Support

If it is not mentioned in that link, then installing it is just not an option. :(

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 Others 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 Only support 64 bit and there is no workaround.

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