While you're waiting for this long download, remember to run a Time Machine backup, just in case something goes wrong during this upgrade. It's a pretty big upgrade. It will take over 30 minutes after you finish downloading, and the "less than a minute remaining" means five to ten minutes.
You'll avoid a panic attack if you run a Time Machine backup before you start, or while it's downloading.
You'll avoid a panic attack if you run a Time Machine backup before you start, or while it's downloading.
