CATALINA DOWNLOAD
Downloaded Catalina, but when prompted to install...I hit 'Continue' button...and nothing further happens. Teaching remotely this coming week and desperately need to sort now?
MacBook Air 11", OS X 10.10
Reboot into a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login
The installer is sitting in your Applications folder— launch it like any other app from here.
"Install macOS Catalina.app"