For those searching I am having this issue with a new 2016 MacBook Pro running sierra v10.12.1. Multiple Install->Reboot cycles with everything still plugged in but the Multiport Update is not being installed.

[RESOLVED]

UPDATE: Your USB-C Power Cord must be plugged directly into your multiport adapter (which is plugged into your laptop) when doing the reboot. Having the adapter plugged into one port, while the power cord is plugged into another of your laptop's ports will not work.

NOTE 1: Working Layout

Wall power outlet => USB-C Power Adapter => USB-C Power Cord => Multiport Adapter => Laptop (You don't need the external display plugged in.)

NOTE 2: When I first plugged my power cord into the multiport adapter, it displayed some weird behavior where the Driver Install prompt went away and the "charging" icon would show briefly, then disappear. I restarted my laptop with everything still plugged in and then the Driver Install prompt stayed visible.

You could probably also click the "Install" button before pluggin in the power cord and once the wizard is open, plug in the power cord. I'd guess the power cord is only required to be plugged into the multiport adapter to give the adapter power during the reboot.

NOTE 3: The time that the install/reboot actually worked, the reboot took a significantly longer time than usual. Probably about 3 mins. So if you also experience that then its a good sign.

Answer from alanning on Stack Exchange
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Apple Community
discussions.apple.com › thread › 255392990
Problems with USB-C port on USB-C Digital AV Multiport ...
I'm surprised the Apple personnel you talked to did not know this. You would need a port duplicator plugged in to the regular USB port to get additional data transfer ports. See the Product Overview section at the following link. click here ➜ USB-C Digital AV Multiport ...
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Apple Community
discussions.apple.com › thread › 255160250
USB-C Digital AV Multiport Adapter not co… - Apple Community
After checking all connection points (power cord, power adapter, HDMI cord) and found no issues connecting to other devices without the multiport adapter I purchased a new adapter which also did not work. Thinking I got a faulty device I purchased a THIRD adapter and this one cannot connect either. Even connecting any of these three to a power source, charging cable and my iphone did not work. Is it possible that all 3 adapters are faulty or is there a way to troubleshoot? ... USBC ports not working at all after updating to Ventura Yesterday I updated my Mac mini to Ventura and realized that my VGA monitor didn't worked anymore neither my USBC hub I also used on the other port, I tried everything even putting in and out the hubs and USBC to VGA adaptor I have but notting worked, I supposed it was a software thing that didn't let my USBC to VGA work anymore..
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Apple Community
discussions.apple.com › thread › 253985908
USB-C Digital AV Multiport Adapter not wo… - Apple Community
Macbook pro suddenly not detecting external monitor anymore Hi everyone, I've been using my MacBook Pro (16-inch, 2019) with an external monitor connected with a thunderbolt cable for the last few months. 2 days ago, when I connected the cable, the laptop started charging as usual but it did not detect the monitor anymore. It does work correctly with a usb-c to HDMI cable, but the text quality is lower and, obviously, it doesn't charge the macbook.
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Reddit
reddit.com › r/mac › usb-c to digital av multiport adapter not working
r/mac on Reddit: USB-C to Digital AV Multiport adapter not working
March 12, 2024 -

Hello all, I recently purchased an M3 Max MacBook pro and had to buy the adapter for additional ports. I just returned my first one and got this second one for the same issue. I plug in my Samsung T7 and it doesn't read. I plug in my Giovision and it works just fine. But when I plug in my T7 to the laptop itself it works just fine as shown. I use a lot of type-c accessories so having the type-c port back after thus adapter is plugged in would be nice. Is there a setting I need to switch on? I'm new to Mac so I have no idea and Google was of no help

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Apple Community
discussions.apple.com › thread › 252209948
USB-C Digital AV Multiport Adapter Not Ch… - Apple Community
I have a new MacBook Pro 13" M1 that is using the USB-C Digital AV Multiport Adapter. I am using this adapter to charge, use USB-A devices as well as connect to my monitor. Often when disconnecting to work away from the desk, then returning the charging capability no longer works but all other ...
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Apple Community
discussions.apple.com › thread › 254516461
Apple original USB-C Digital AV Multiport… - Apple Community
This disrupted my workflow for a couple of months, as I couldn't use any external monitor with my laptop on my day-to-day work until X.2 arrived. ... Apple USB-C Digital AV Multiport Adapter Malfunctioning I’m currently having issues with the Apple-brand USB-C Digital AV Multiport Adapter connected to my 2020 MacBook Air M1.
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Apple Community
discussions.apple.com › thread › 251562373
USB C of Apple USB-C Digital AV Multiport… - Apple Community
I bought an Apple USB-C Digital AV Multiport Adapter for my macbook pro last year, but USB C port of adaptor doesn't work, it can't not charge or connect to any device.
Top answer
1 of 5
3

For those searching I am having this issue with a new 2016 MacBook Pro running sierra v10.12.1. Multiple Install->Reboot cycles with everything still plugged in but the Multiport Update is not being installed.

[RESOLVED]

UPDATE: Your USB-C Power Cord must be plugged directly into your multiport adapter (which is plugged into your laptop) when doing the reboot. Having the adapter plugged into one port, while the power cord is plugged into another of your laptop's ports will not work.

NOTE 1: Working Layout

Wall power outlet => USB-C Power Adapter => USB-C Power Cord => Multiport Adapter => Laptop (You don't need the external display plugged in.)

NOTE 2: When I first plugged my power cord into the multiport adapter, it displayed some weird behavior where the Driver Install prompt went away and the "charging" icon would show briefly, then disappear. I restarted my laptop with everything still plugged in and then the Driver Install prompt stayed visible.

You could probably also click the "Install" button before pluggin in the power cord and once the wizard is open, plug in the power cord. I'd guess the power cord is only required to be plugged into the multiport adapter to give the adapter power during the reboot.

NOTE 3: The time that the install/reboot actually worked, the reboot took a significantly longer time than usual. Probably about 3 mins. So if you also experience that then its a good sign.

2 of 5
0

The issue has (finally) been resolved!

The solution was to:

  1. Manually download the 10.11.5 (newest) OSX update from the Apple website and install it
  2. Reboot the machine
  3. Plug in the USB-C Multiport Adapter
  4. Install the suggested update
  5. Reboot

(thanks to Gilby for suggesting the re-install of the update)

Find elsewhere
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Apple Community
discussions.apple.com › thread › 253826080
USB-C Digital AV Multiport Adapter No Lon… - Apple Community
I swapped in another USB-C Digital AV Multiport Adapter and it works great. I also plugged the bad one directly into a USB-C PD charger and it didn't pass power to the device plugged into it. Anyone else have this $70 dongle just quit passing power but not totally fail?
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Apple Community
discussions.apple.com › thread › 255946774
USB-C to Digital AV Adapter Not Charging … - Apple Community
... You are correct. I changed chargers from the 12W Apple charger with a USB-A port for the output to an Apple 20W charger with a USB-C port for the output. I then connected the 20W charger with the USC-C to USB-C cable that came with the iPhone to the Digital Adapter, and everything worked.
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Apple Community
discussions.apple.com › thread › 254299106
The USB-C Digital AV Multiport Adapter be… - Apple Community
I recently bought USB-C Digital AV Multiport Adapter for my MacBook Pro (13-inch, M2, 2022) so I could use my External Hard Drive (WD Elements Portable, 2T, USB3) with my previous computer's data. When I connected the Hard Drive to the USB entry on the adapter and the adaptor to the MacBook, I noticed the data transfer was extremely slow and basically unusable.
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Apple Community
discussions.apple.com › thread › 254473397
USB-C Digital AV Multiport Adapter won't … - Apple Community
I also tried it on another 3 iPads but the Hdmi port does not work on them. but it can't be the port because it connects to Mac and I can connect it to the tv. IT JUST DOES NOT CONNECT TO MY IPAD. if anyone has any suggestions please say . ... I have a new iPad Pro 11” and a newish 4K Sony TV and can’t get my USB-C to Digital AV Multiport Adaptor to work?
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Apple Community
discussions.apple.com › thread › 254678981
Trouble with usb devices when using USB-C… - Apple Community
According to the description of the cable from Amazon, this cable with not work with a hub using Thunderbolt 3. We'd advise on simply connecting the multipart adapter directly into your computer or finding a different cable to ensure it connects and is detected immediately.
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Apple Community
discussions.apple.com › thread › 255551337
Apple USB C digital AV multiport adapter … - Apple Community
On my 2020 M1 Pro running Sonoma 14.2.1, my adapter keeps connecting and disconnecting from the external monitor. This not only happens for multiple cables and monitors on the HDMI port, but the USB input also regularly disconnects. This has rendered my $69 dongle worthless. This has in turn rendered the MacBook useless for presentations if there is no available usb c connection, which is unacceptable. I could use some help. ... Apple USB-C Digital AV Multiport Adapter Malfunctioning I’m currently having issues with the Apple-brand USB-C Digital AV Multiport Adapter connected to my 2020 MacBook Air M1.
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Apple Community
discussions.apple.com › thread › 255091418
Apple USB-C Digital AV Multi-port Adaptor not charging.
At that point charging stops and the adaptor icon on the iPad disappears. The AV adaptor is passing power out from the iPad to devices connected to the USB-A port.
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Apple Community
discussions.apple.com › thread › 254953191
USB-C port in dongle adaptors not working… - Apple Community
HDMI displayport through USB C adapter doesn't work on Ventura OS for 13" MBP 2020 (Intel based) My office setup using MBP has always been connected to 2nd monitor via HDMI through Anker USB C adapter (self powered) since I bought it, suddenly it stopped working after Ventura upgrade. The same configuration connected to my wife's MBP which is still on Monterey 12.4 and it's working fine. WHY? is there a way around to get it to work? I have invested so much, in fact, I have bought a brand new USB-C Digital AV Multiport Adapter from Apple store and it still not working!!
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Apple Support
support.apple.com › en-us › 119850
About the Apple USB-C Digital AV Multiport Adapter - Apple Support
When the adapter is connected to a Mac, you can also check the USB section of System Information. The Product Identifier for A2119 is 0x1463.
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Apple Community
discussions.apple.com › thread › 254669892
USB-C Digital AV Multiport Adapter Stop W… - Apple Community
February 28, 2023 - If that doesn’t work, unplug the display from its power source, then plug it in again. See the Apple Support article Charge and connect with the USB-C port on iPad Pro. ... Plug a Lightning Digital AV Adapter or Lightning to VGA Adapter into the charging port on iPad.
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Apple Community
discussions.apple.com › thread › 251969752
USB-C Digital AV Multiport Adapter is not… - Apple Community
I bought the Adapter so I could charge while connected to Ethernet (via a USB ethernet dongle attached to the Adapter's USB port). The Ethernet works, but the Adapter doesn't charge the iPad Pro.
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MacRumors
forums.macrumors.com › macs › mac accessories
USB-C Digital AV Multiport Adapter Not working properly | MacRumors Forums
June 20, 2022 - I am looking to use this device for hdmi to tv and usb a to external dac ( dragonfly black). The hdmi functions as expected. The dac however is not. I can select it in sound as output in system preferences however sound is not being passed through to dragonfly. Sound is being processed...