I have a MacPro 5,1 successfully running OC 0.7.0 and Catalina 10.15.7 (19H1217). What is the proper procedure to receive the latest security update (19H1323)? I only get a prompt to install Big Sur in the standard software update and downloading the (19H1323) installer separately results in a "your system does not support this update".
thx
Enable the VMM flag.