Update to Ventura 13.6.6 from Montery 12.7.4?
Can I update to Ventura 13.6.6 from Montery 12.7.4? What issues will I encounter with apps?
iMac 27″ 5K, macOS 12.7
Is your iMac a 2017 model or later? The model year of an iMac is available at Apple menu > About This Mac.
A 2017 iMac can be upgraded to the latest version of Ventura macOS 13 but no later.
For all of the above, see instructions in: How to download and install macOS - Apple Support
A 2019 or later iMac can be upgraded to the current version of Sonoma macOS 14. See: How to upgrade to macOS Sonoma - Apple Support