iMac Upgrade / Install USB Patched for MacOS 15 Sequoia on Unsupported Macs
Once upgrade you will be able to continue to apply the latest updates. iMac 21.5 Late-2012 (iMac13,1). iMac 27" Late-2012 (iMac13,2). iMac 21.5" Core i5 Late-2013 (iMac14,1). iMac 27" Late-2013 (iMac14,2).