Download and install macOS Ventura

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 ? 

If Yes, suggest having at least 50 GB of Empty Space on the drive.

It will allow the Full Version ( about 12.xx GB ) to download, expand and then commence to install.

If there is Third Party Security Software installed - remove it.

It will interfere with both the download and installation process.

The below links will help identify which version of macOS  this computer may Qualify to run.

macOS Sonoma is compatible with these computers

Computer Qualifying for macOS 13 Ventura 

Computer Qualify for the Monterey upgrade

macOS Big Sur 11 hardware requirements

Make Time Machine Backup  before doing any upGrades 

Ventura requires a 2017 or later iMac.

Here’s the helpful information you asked for:

Need more help?

• Chat now or call 1-800-APLCARE.
• International Support.

Click ▶︎ macOS User Guide. 📖

Smilin-Brian wrote:

Here’s the helpful information you asked for:

FWIW, the "helpful" information makes no mention of the requirements for Ventura.

It’s helpful because it explains how to update macOS. 🖥️

FYI: 21.5 inch 4K retina was released in 2017 (I owned one). 👈🏼

Smilin-Brian wrote:

FYI: 21.5 inch 4K retina was released in 2017 (I owned one). 👈🏼

Not that it matters but the first one was sold Late 2015.

edit: See my first post.