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Living in Northern California, we have been dealing with power outages and loss of internet and home phone service. Having said that, is wifi required to install the update on my MBP?

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And… once the update is downloaded it should be able to install without being connected to any network

On Thu, 31 Oct 2019 Tony M wrote:
Living in Northern California, we have been dealing with power outages and?loss of internet and home phone service. Having said that, is wifi required to?install the update on my MBP?

Otto Nikolaus rep[lied:

You need a connection from your Mac to the Apple servers. If you only have Wi-Fi on your Mac, that is what you must use. If you have an ethernet port on your?Mac, or a Thunderbolt-Ethernet adapter, you can connect to your router using a?cable.?

You need a net connection at some point to download the installer, which is several?gigabytes.
Once downloaded, you should be able to complete the installation offline.