Sometimes automatic updates and installs don;t work, and in other cases you might need an installer somewhere with no internet connection. In those cases you can download the installers ahead of time, and install them directly.
The web site "OSX Daily" maintains a list of locations where the macOS (and Mac OS X and OSX) installers can be downloaded from:
I usually write a blog post about once a week. The latest post can be viewed here: Terrorism vs Genocide: Please don't feel like you need to be ashamed of New Zealand's response. (posted 2025-10-03 at 17:02:25). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2029-09-09 Kiwi Values: From a practical perspective it has too many problems..