how do i identify my mac model it just says iMac 14.3 but that number does not show n the choose your model page when looking to see how to upgrade memory

There might be an easy fix. Let’s start with an EtreCheck report. EtreCheck is a useful App to diagnose and identify issues, both hardware and software. It is trusted by many users. Please follow the steps outlined below:

1. Navigate to: https://etrecheck.com and get the free version of EtreCheckPro.
2. Download it. It is a free and trusted app. It is often recommended here on Apple Support Communities. 
3. Open EtreCheck, and before running the report, be sure to check “Allow full Drive Access” at the bottom of the EtreCheckPro window.
4. Run the report, and put it in a post, as seen here: https://discussions.apple.com/docs/DOC-250000211. We will then examine the report for issues in your Mac.

Jack

About this Mac show the model name Apple gives:

A 14,3 is a Late 2012 21.5-inch iMac and RAM is not user-upgradeable. It requires expensive professional installation and some Apple Authorized Service Providers will not do this difficult work.

If your computer is slow it is likely something other than RAM, like the slow factory hard drive Apple installed in 21.5inch iMacs from 2012 to 2019.

RoyB49 wrote:

Thank you. Looks like I'll be scrapping it if it's going to cost at lot to fix.

Are you having performance issues?