I think I know what happened when I lost the MacOS partition.Actually all was working fine before. I had my laptop connected to an external screen by HDMI, with a wireless keyboard and a wireless mouse. The laptop was closed all the time. Usually, I activate the "sleep" mode when I don't use it. But the last time, I shut down the computer while closed and connected (HDMI). At this point, the macOS partition was lost. Does anyone experienced this issue?