Thanks for the reminder about disconnecting peripherals Harv. I'm not used to doing that because my old Mac Pro had all extra drives internally. I just installed the update (total of about 25 minutes, including 15 minutes to download).
I downloaded the update via the App Store > Software Update. So far, so good.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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