Your Mac provides several tools to help you identify it. The simplest is About This Mac, available by choosing About This Mac from the Apple () menu in the upper-left corner of your screen. The other is the System Information app. Learn how to use these tools to identify your Mac.

You can find your Mac's serial number in Apple System Profiler: Select the Apple Menu About This Mac, then (depending on the version of OSX you are running) click the System Report button or the More Info button. This brings up System Profiler, and on the Hardware Overview that is displayed by default you should see your serial number, and be able to copy/paste it.

If you don’t have your Mac or it doesn’t start up, use one of these solutions instead:

• Find the serial number printed on the underside of your Mac, near the regulatory markings. It’s also on the original packaging, next to a barcode label. You can then enter that serial number on the Check Coverage page to find your model.
• The original packaging might also show an Apple part number, such as MMQA2xx/A (“xx” is a variable that differs by country or region). You can match the Apple part number to one in the list below to find your model.

List of iMac models

iMac models are organized by the year they were introduced, starting with the most recent. Click the model name for detailed technical specifications.

iMac models from 2012 and newer can run the latest version of macOS. For models from before 2012, the latest compatible operating system is noted.

2019

iMac (Retina 5K, 27-inch, 2019)
Model Identifier: iMac19,1
Part Numbers: MRQYxx/A, MRR0xx/A, MRR1xx/A
Tech Specs: iMac (Retina 5K, 27-inch, 2019)

iMac (Retina 4K, 21.5-inch, 2019)
Model Identifier: iMac19,2
Part Numbers: MRT3xx/A, MRT4xx/A
Tech Specs: iMac (Retina 4K, 21.5-inch, 2019)

2017

iMac (Retina 5K, 27-inch, 2017)
Model Identifier: iMac18,3
Part Numbers: MNE92xx/A, MNEA2xx/A, MNED2xx/A
Tech Specs: iMac (Retina 5K, 27-inch, 2017)

iMac (Retina 4K, 21.5-inch, 2017)
Model Identifier: iMac18,2
Part Numbers: MNDY2xx/A, MNE02xx/A
Tech Specs: iMac (Retina 4K, 21.5-inch, 2017)

iMac (21.5-inch, 2017)
Model Identifier: iMac18,1
Part Numbers: MMQA2xx/A
Tech Specs: iMac (21.5-inch, 2017)

2015

iMac (Retina 5K, 27-inch, Late 2015)
Model Identifier: iMac17,1
Part Numbers: MK462xx/A, MK472xx/A, MK482xx/A
Tech Specs: iMac (Retina 5K, 27-inch, Late 2015)

iMac (Retina 4K, 21.5-inch, Late 2015)
Model Identifier: iMac16,2
Part Numbers: MK452xx/A
Tech Specs: iMac (Retina 4K, 21.5-inch, Late 2015)

iMac (21.5-inch, Late 2015)
Model Identifier: iMac16,1
Part Numbers: MK142xx/A, MK442xx/A
Tech Specs: iMac (21.5-inch, Late 2015)

iMac (Retina 5K, 27-inch, Mid 2015)
Model Identifier: iMac15,1
Part Numbers: MF885xx/A
Tech Specs: iMac (Retina 5K, 27-inch, Mid 2015)

2014

iMac (Retina 5K, 27-inch, Late 2014)
Model Identifier: iMac15,1
Part Number: MF886xx/A
Tech Specs: iMac (Retina 5K, 27-inch, Late 2014)

iMac (21.5-inch, Mid 2014)
Model Identifier: iMac14,4
Part Number: MF883xx/A, MG022xx/A
Tech Specs: iMac (21.5-inch, Mid 2014)

2013

iMac (27-inch, Late 2013)
Model Identifier: iMac14,2
Part Number: ME086xx/A, ME088xx/A
Tech Specs: iMac (27-inch, Late 2013)

iMac (21.5-inch, Late 2013)
Model Identifier: iMac14,1
Part Number: ME086xx/A, ME087xx/A
Tech Specs: iMac (21.5-inch, Late 2013)

2012

iMac (27-inch, Late 2012)
Model Identifier: iMac13,2
Part Number: MD095xx/A, MD096xx/A
Tech Specs: iMac (27-inch, Late 2012)

iMac (21.5-inch, Late 2012)
Model Identifier: iMac13,1
Part Number: MD093xx/A, MD094xx/A
Tech Specs: iMac (21.5-inch, Late 2012)

2011

iMac (27-inch, Mid 2011)
Model Identifier: iMac12,2
Part Number: MC813xx/A, MC814xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (27-inch, Mid 2011)

iMac (21.5-inch, Mid 2011)
Model Identifier: iMac12,1
Part Number: MC309xx/A, MC812xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (21.5-inch, Mid 2011)

2010

iMac (27-inch, Mid 2010)
Model Identifier: iMac11,3
Part Number: MC510xx/A, MC511xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (27-inch, Mid 2010)

iMac (21.5-inch, Mid 2010)
Model Identifier: iMac11,2
Part Number: MC508xx/A, MC509xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (21.5-inch, Mid 2010)

2009

iMac (27-inch, Late 2009)
Model Identifier: iMac10,1
Part Number: MB952xx/A, MB953xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (27-inch, Late 2009)

iMac (21.5-inch, Late 2009)
Model Identifier: iMac10,1
Part Number: MB950xx/A, MC413xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: iMac (21.5-inch, Late 2009)

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iMac (24-inch, Early 2009)
Model Identifier: iMac9,1
Part Number: MB418xx/A, MB419xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: iMac (24-inch, Early 2009)

iMac (20-inch, Early 2009)
Model Identifier: iMac9,1
Part Number: MB417xx/A, MC019xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: iMac (20-inch, Early 2009)