How to find your Mac serial number and build date

May 24, 2011 in Mac OS X

Reader Patti recently submitted a question asking how to find when her iMac was built. This question is often related to figuring out if your Mac is still under warranty. The first step is to find your Mac’s serial number.

In this video I show you how to find the serial number in System Profiler. You can then enter (or, hopefully, paste) the serial number into these web pages.

If you don’t need either right now but would like a quick refresher on copy and pasting, the video covers that too.

Video too small? Watch full screen by clicking the YouTube Full Screen button button here

Of course, after I made this video my son taught me another way to find the serial number. (Yes, we have three generations of Mac users in the family.) In the “About This Mac” window, if you click twice on the Mac OS X version number, it will display the serial number like this:

Displaying the serial number in the About This Mac window

Displaying the serial number in the About This Mac window

That’s neat, but it doesn’t let you select and copy the serial number like you can in the System Profiler, so I’m sticking with my method.

{ 2 comments… read them below or add one }

Joe February 27, 2015 at 3:16 pm

Awesome, thank you!


Peter O. August 16, 2017 at 5:49 am

Thank you for this information 🙂

I was looking for the built date of the used iMac I just bought.


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