crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

OS-X El Capitan 10.11.x is the highest it can go, sorry ;-{

Your systems specs: [https://everymac.com/systems/apple/imac/specs/imac-core-2-duo-2.26-20-inch-aluminum-mid-2009-education-specs.html|20” iMac 2.26 GHz Core 2 Duo (Mid-2009)]

crwdns2915684:0crwdne2915684:0:

open