Ventura update fails after download, while "Preparing MacOs Ventura 13.0.1... Then returns to the download prompt

I solved my failed OS upgrade problem by disconnecting all wired peripherals and then booting into Safe mode, (hold shift key while booting). Then I ran the upgrade and it worked this time.

I'm unsure what was preventing my previous four attempts to download and install. I wish I could download once and retry without needing to download again each attempt.

I can also happily report that my Drobo 5D thunderbolt disk storage array is working as is the Drobo dashboard software. There is great controversy and consternation among Drobo users about this incompatibility issue. I’m assuming the previously installed Drobo kernel extensions we’re white listed and permitted to coexist under Ventura, even though .kexts are no longer supported under Ventura as a new install. But whatever… the Drobo still works and I’m able to check the health of each drive with the dashboard.

I had already copied everything off of my Drobo. And I was just wondering if it would continue to function under Ventura. I’m happy that it still works it’s an old workhorse.