The exceptions are the early 2006 models with the iMac 4,1 or iMac 4,2 identifier. These models used the Intel Core Duo processors, the first generation of the Core Duo line. The Core Duo processors use a 32-bit architecture instead of the 64-bit architecture seen in later Intel processors. 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. On October 23, 2012, a new iMac was announced (for a November/December release) with a substantially thinner edge, new Apple Fusion Drive, faster processors (Intel Core i5 and i7 Ivy Bridge) and graphics along with updates to the ports, but with the same overall depth (stand depth: 8 inches (20.3 cm)). The UI is fairly clean (not cluttered). I like OS X 10.11 compared to earlier ones like Mac OS X 10.7, 10.6 down to Tiger 10.4. I skipped Mac OS X 10.8, 10.9 and 10.10 and just upgraded directly from 10.6.8 to 10.11. Plus OS X 10.11 supports latest browsers from Google and Firefox so many websites work well with latest browsers.
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.
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 names to get detailed technical specifications or to view the user guide.
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.
2020
iMac (Retina 5K, 27-inch, 2020)
Model Identifier: iMac20,1, iMac20,2
Part Numbers: MXWT2xx/A, MXWU2xx/A, MXWV2xx/A
Tech Specs: iMac (Retina 5K, 27-inch, 2020)
User Guide: iMac (Retina 5K, 27-inch, 2020)
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)
User Guide: iMac (Retina 5K, 27-inch, 2019)
iMac (Retina 4K, 21.5-inch, 2019)
Model Identifier: iMac19,2
Part Numbers: MRT3xx/A, MRT4xx/A, MHK23xx/A
Tech Specs: iMac (Retina 4K, 21.5-inch, 2019)
User Guide: iMac (Retina 4K, 21.5-inch, 2019)
2017
iMac Pro
Model Identifier: iMacPro1,1
Part Numbers: MQ2Y2xx/A, MHLV3xx/A
Tech Specs: iMac Pro (2017)
User Guide: iMac Pro (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)
User Guide: 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)
User Guide: iMac (Retina 4K, 21.5-inch, 2017)
iMac (21.5-inch, 2017)
Model Identifier: iMac18,1
Part Numbers: MMQA2xx/A, MHK03xx/A
Tech Specs: iMac (21.5-inch, 2017)
User Guide: 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)
User Guide: iMac (Retina 5K, 27-inch, Late 2015)
Imac 21.5 Late 2012 Latest Os
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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: 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)
User Guide: iMac (21.5-inch, Late 2009)
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)
User Guide: iMac (24-inch, Early 2009)
Late 2012 Imac Latest Os
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)
User Guide: iMac (20-inch, Early 2009)