How can I upgrade my IMAC 21.5" 2010 higher than MacOS High Sierra v10.13.6
I have an IMAC 21.5" mid 2010 with MaOS High Sierra, v10.13.6.I tried upgrading it to macOS Sonoma from the App Store . When I clicked Download, it gave me a message that macOS 14.61 cannot be installed on this computer. Anyone has a suggestion on how to upgrade my mac higher than High Sierra v10.13.6?
iMac 21.5″, macOS 10.13