Make sure you have enough free disk space.Check Apple’s System Status page to make sure the servers are working properly.Check if your internet connection is working properly.If you do, you will see a message that says something like ‘macOS Ventura download has failed.’ Follow the steps below to fix the problem. Hopefully, you won’t encounter this problem, but it’s the first possible obstacle you could come across. So far, this issue is unresolved, but it will hopefully be fixed by the time the full version ships. However, in some instances, Ventura seems only to download the additional files it needs to update your Mac rather than the full installer, so you can’t make an external boot disk.

Previously, when you downloaded a beta version of macOS or upgraded to a full version, it put the installer in your Applications folder, and you could use that to make an external boot disk.

One of the first issues to be identified with the beta of macOS Ventura is the way it downloads and how that affects you if you want to install it on an external disk. Using Time Machine is the best way to do it because it’s easy to restore from a Time Machine backup in macOS Recovery. Always back up your Mac before updating the macOS.

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