What if you don’t have a vendor name, but just a vendor ID number? Now that I had a vendor name, I did a search with using the search term realtek lan 10/100/1000 driver mac. Step 2: Search for the vendor’s site, and in particular, the page containing the driver you need This shouldn’t have been a surprise: Realtek, a chip manufacturer in Taiwan, have had the majority share of the ethernet controller market since the early 2000s. They also have a good chunk of the sound chip market, so I’m no stranger to their drivers or their distinctive “crab” logo. I found the information that I needed: the Vendor ID, and better still, an actual vendor name: Realtek. Once I found that entry, I clicked on it, which then caused its details to appear in the lower part of the right pane. I then went through the USB 3.1 Bus entries in the USB Device Tree list in search of an entry containing the word LAN. The USB Device Tree list appeared in the window’s right pane. I expanded the Hardware menu and selected the USB item. A lot of peripherals have information such as vendor IDs encoded to them, and you can use System Report to find it. Its Hardware list provides information about the hardware in and attached to the computer. This window provides a run-down of the hardware, software, and networking on your Mac. I clicked the System Report… button, which opened the System Report window: With the dongle plugged into my MacBook, I opened the Apple menu and selected About This Mac. My plan was to find the manufacturer of the networking chip inside my dongle, then find their webpage, then hopefully find a driver. Here’s a pic showing a Mokin dongle and its internals: From Mokin’s site. They may manufacture the cases and simpler electronics, but they purchase lot (or all of) the fancier tech from manufacturers, such as networking chips. I had a pretty good guess why this was happening and how to fix it.

The dongle worked like a charm out of the box with the notable exception of one part: The Ethernet port. I recently got a Mokin 10-in-1 USB-C dongle for use with my work computer, a 2019 16″ MacBook Pro, whose only connectors are 4 Thunderbolt/USB-C ports and a 3.5 mm audio jack.

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