Catalina
What if the Installer doesn't open automatically after Catalina is downloaded?
iMac 21.5", macOS 10.14
What if the Installer doesn't open automatically after Catalina is downloaded?
iMac 21.5", macOS 10.14
Check the application folder.
Finder > Applications
Go to the Applications folder (press command-shift-A in the Finder).
The installer should be there. It is called "Install macOS Catalina". Double-click to start.
Catalina