crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 mayer

crwdns2934249:0crwdne2934249:0:

The highest system this machine will take is El Capitan
Pre-Installed MacOS:X 10.5.8Maximum MacOS:X 10.11.x*
https://everymac.com/systems/apple/imac/specs/imac-core-2-duo-2.26-20-inch-aluminum-mid-2009-education-specs.html
+
+UPDATE 3/2022 DosDude has now come out with work arounds and patches. which allow for system upgrades to unsupported Macs. I have had fair luck using them.

crwdns2915684:0crwdne2915684:0:

open

crwdns2934245:0crwdne2934245:0 mayer

crwdns2934249:0crwdne2934249:0:

The highest system this machine will take is El Capitan
Pre-Installed MacOS:X 10.5.8Maximum MacOS:X 10.11.x*
+
+https://everymac.com/systems/apple/imac/specs/imac-core-2-duo-2.26-20-inch-aluminum-mid-2009-education-specs.html

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

The highest system this machine will take is El Capitan

Pre-Installed MacOS:X 10.5.8Maximum MacOS:X 10.11.x*

crwdns2915684:0crwdne2915684:0:

open