Trying to update software on iMac

Trying to update software on iMac (Retina 5K, Late 2015) model to Sonoma. On the App Store it says it is compatible with this Mac so unsure why when I go to update it says it isn't? Hope someone can clarify.

iMac 27″, macOS 12.6

Posted on Nov 8, 2023 7:49 AM

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Question marked as Top-ranking reply

Posted on Nov 8, 2023 8:02 AM

A 2015 iMac cannot be updated beyond macOS Monterey. See the following from Identify your iMac model - Apple Support


iMac (Retina 5K, 27-inch, Late 2015)

Model Identifier: iMac17,1

Part Numbers: MK462xx/A, MK472xx/A, MK482xx/A

Newest compatible operating system: macOS Monterey


iMac (Retina 4K, 21.5-inch, Late 2015)

Model Identifier: iMac16,2

Part Numbers: MK452xx/A

Newest compatible operating system: macOS Monterey


iMac (21.5-inch, Late 2015)

Model Identifier: iMac16,1

Part Numbers: MK142xx/A, MK442xx/A

Newest compatible operating system: macOS Monterey


iMac (Retina 5K, 27-inch, Mid 2015)

Model Identifier: iMac15,1

Part Numbers: MF885xx/A

Newest compatible operating system: macOS Monterey



Also see the following from macOS Sonoma is compatible with these computers - Apple Support


iMac

Identify your iMac

  • iMac (24-inch, M1, 2021)
  • iMac (Retina 5K, 27-inch, 2020)
  • iMac (Retina 5K, 27-inch, 2019)
  • iMac (Retina 4K, 21.5-inch, 2019)





2 replies
Question marked as Top-ranking reply

Nov 8, 2023 8:02 AM in response to gabby_hall

A 2015 iMac cannot be updated beyond macOS Monterey. See the following from Identify your iMac model - Apple Support


iMac (Retina 5K, 27-inch, Late 2015)

Model Identifier: iMac17,1

Part Numbers: MK462xx/A, MK472xx/A, MK482xx/A

Newest compatible operating system: macOS Monterey


iMac (Retina 4K, 21.5-inch, Late 2015)

Model Identifier: iMac16,2

Part Numbers: MK452xx/A

Newest compatible operating system: macOS Monterey


iMac (21.5-inch, Late 2015)

Model Identifier: iMac16,1

Part Numbers: MK142xx/A, MK442xx/A

Newest compatible operating system: macOS Monterey


iMac (Retina 5K, 27-inch, Mid 2015)

Model Identifier: iMac15,1

Part Numbers: MF885xx/A

Newest compatible operating system: macOS Monterey



Also see the following from macOS Sonoma is compatible with these computers - Apple Support


iMac

Identify your iMac

  • iMac (24-inch, M1, 2021)
  • iMac (Retina 5K, 27-inch, 2020)
  • iMac (Retina 5K, 27-inch, 2019)
  • iMac (Retina 4K, 21.5-inch, 2019)





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Trying to update software on iMac

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