DevOps: Installing macOS 13.0 Ventura and downloading/installing older available macOS versions

Apple likes to publish a new Mac operating system every year, including beta versions and incremental builds, and there can sometimes be many of those released throughout the year, like we’ve seen in 2022. On October 24 of this year, Apple graced us with macOS Ventura 13.0. Last year, 2021, the company gave us macOS 12.0 Monterey. Wouldn’t it be nice if you could just get a list of available macOS versions, select the one you want, have that macOS installer app download to your /Applications folder, and then you can run that installer whenever you’re ready? You can and I’ll show you how. Here’s what you see after you download the installer for macOS 13.0 Ventura (installer highlighted in green):

More specifically, I’ll tell you how to install Apple’s new and first alpha version of its desktop operating system software, macOS Ventura 13.0, from a Mac that is most likely still on macOS Monterey — especially if you keep up with the Apple world. I’ll also tell you how to download installers for approximately every public macOS build number within the last two years.

In today’s tutorial, we’ll be using the dreaded command line, but don’t worry. All that pretty user interface can just make code more buggy, and Apple always seems to have problems with getting new macOS versions downloaded and/or installed. Today, we’ll be cutting out some fluff and talking (almost) directly to macOS using a Terminal command called softwareupdate. It’s very reliable. I know everything I show you here today works on Monterey and Ventura and I know the command goes all the way back to macOS El Capitan 10.11. If you’re using softwareupdate on an older macOS version, just do a man softwareupdate at the command line and study the help. Here we go…

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