I'm trying to install macOS Catalina. Currently I have Mojave, macbook pro 13", mid 2012. System suggested this upgrade so I decided to install it right away :)
When Catalina installer started it asked about accepting license and then to choose disk. After that beachball of death appears i.e. the installer process is frozen (and is marked red in Activity Monitor). After 30m I force killed this process and retried 3 times, so far.
How can I determine what is slowing or stopping my installation?