Paul_s1976 wrote:
how do I get my Mac to update when it will not find the latest software, currently using Catalina, and want to update to Ventura?
Here I may be picky on word usage but upDate means within the Existing version of macOS
In you computers case macOS 10.15.5 to Catalina 10.15.7
Now an upGrade is a very different matter and requires different means to achieve this
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.
Does this computer appear as Listed and qualifying for an upGrade to a newer version of macOS?
The below links will help identify which version of macOS this computer may Qualify to run.
Computer Qualifying for macOS 13 Ventura
Computer Qualify for the Monterey upgrade
macOS Big Sur 11 hardware requirements
macOS Catalina 10.15 hardware requirements
Make Time Machine Backup is very useful