How to share a Wi-Fi connection on one Mac over ethernet to another

It’s a great way to bridge your network if you have an older Mac with either broken, missing, failing, or weak Wi-Fi.

Apple added an Internet Sharing option in the Sharing system preference many years ago. This feature lets you share one Mac's incoming internet connection via other network interfaces on that Mac. At one point, this was a popular way to create what was once called a software base station and now is more generally called a personal hotspot.

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Glenn Fleishman
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