Mojave.

You can add a codicil yourself...quite easy...I know, I did myself and it's free.

Google the procedure if you want the instructions.

jaybass


OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD