I am trying to update my Mac to the latest OS and receiving a very generic message "this version of macOS 12.5.1 cannot be installed on this computer". Clicking the learn more button is ineffective. What is the reason that I can not install it?
A mid 2011 iMac can be upgraded to High Sierra 10.13.6 but no later version. See the following from Identify your iMac model - Apple Support
iMac (27-inch, Mid 2011)
Model Identifier: iMac12,2
Part Number: MC813xx/A, MC814xx/A
Latest 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
Latest 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)
A mid 2011 iMac can be upgraded to High Sierra 10.13.6 but no later version. See the following from Identify your iMac model - Apple Support
iMac (27-inch, Mid 2011)
Model Identifier: iMac12,2
Part Number: MC813xx/A, MC814xx/A
Latest 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
Latest 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)
Is your Mac compatible?
What type of Mac (iMac, Mac Mini, MacBook Air, etc) and what model year is it (both are available at Apple menu > About this Mac)?
It is an iMac mid 2011
Unable to run the update on my Mac to the latest OS
