How do I update my software on my mac?

Unless Q: is really 'how do I Upgrade my software on my Mac'

..not just update an existing system, to the next progressive step..

The answer varies, should there be need to go beyond present

circumstances; and if mac hardware, can in fact use the upgrade.

For systems prior to Catalina 10.15.x an issue concerning 32-bit

software and drivers, may need to be addressed; to get new

replacement 64-bit software and drivers; & run those in 10.15.6.

• Go 64: Check Your Apps and Prepare for a 64-bit World

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

"Free tool to Quickly scan your disk for applications, see which ones

are 32-bit, and find upgrade information with the click of a button."

An update vs upgrade, involves further consideration; and newer

software to handle similar tasks in the newer macOS system. So

the question remains: which macOS, and are you seeking newer?

macOS versions

• Catalina
• Mojave
• High Sierra
• Sierra

OS X versions

• El Capitan
• Yosemite

• How to get installers of old macOS versions directly from Apple - appletoolbox

https://appletoolbox.com/how-to-get-installers-of-old-macos-versions-directly-from-apple/

(This article covers issues ^ involving expired installer certificates & making USB installer, etc.)

Other direct links in Apple support articles are helpful to prepare a disk to install macOS.

• Reinstall macOS - Apple Support (article toggles between three latest macOS versions)

https://support.apple.com/guide/mac-help/reinstall-macos-mchlp1599/10.14/mac/10.14

Older more complete reinstall article has useful information and key shortcuts for most macOS.

• How to reinstall macOS from macOS Recovery - Apple Support

https://support.apple.com/en-us/HT204904

While your Q: initially suggests a lesser update ~ this says what else may need done.

Take care and happy trails!🌞🎣

Hi,

How to update the software on your Mac.

https://support.apple.com/en-us/HT201541