How to find your Mac's Model ID
Are you confused about how to identify your Apple machine? One of the most effective ways is to find your Model Identifier. For example, the most recent release of the 27" iMac is the Late 2015 version and has the Model ID 17,1.
If you're not sure, we can help by following these three easy steps.
Step 1: Click on the Apple menu in your toolbar, then click on "About This Mac."
Step 2: On the About This Mac screen, click on the "System Report..." button.
Step 3: The second line listed will be your Model Identifier (Model ID).