This was another easy upgrade. I did first a Time Machine backup, followed by a image backup by SuperDuper. Incidentally, this means I can pull back data - such as files using Time Machine, or I can restore my entire MBP using the image that SuperDuper did. Then I started the upgrade and it seemed to be a somewhat quick one - maybe 30 minutes before I could log back in.
I have done an older MacBook Air, and a newer MacBook Pro (with touchbar) and it all worked fine. This includes my apps like Office 2016, Horizon View, Tweetbot, BusyCal, BusyContacts, Slack, and SecureCRT.
You can learn more about this minor update in this article.
Michael
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