Error -6002D
I have an iMac 27" older one (cant remember the year was running OSx 10.15.2) and I got now Error -6002D when trying to upgrade to the new 10:15:3 and i cant find what it means anywhere. The update was interapted it says and i dont know what to do next and how not to format the HD and loss my stuff. (its not on icloud).