Hello fzinken,
thank for your help.
Unfortunately, a new problem : OSMC installer error. Here the end of the log :
jeu. déc. 24 06:50:43 2020 Imaging failed!
jeu. déc. 24 06:50:43 2020 Messages are:
jeu. déc. 24 06:50:43 2020 stdout:
jeu. déc. 24 06:50:43 2020 stderr: 0:135: execution error: dd: /dev/rdisk4: Operation not permitted (1)
It looks like it’s a known problem : OSMC installer fails on macOS Catalina 10.15.3 - #5 by paul34949 that should have been solved but no. I’ll try using DD or another installer…