If you know your way around a terminal follow this guide to get it solved. First off, make three checks; first that you are on Mac OS X High Sierra (Build 10.13 or greater), that your Multiport Adapter reports a firmware version below 2.33 (around 1.53 is old), and finally that the folder '/System/Library/CoreServices/Firmware Updates' is empty. At a high-level, I guessed that I would find the firmware update package in an old Mac OS Combo Update file. Hunch turned out to be right, and I was able to install the firmware update.
Lets trace those steps so you can do the same. First up, kick off the download (around 1.5gb) of the macOS Sierra 10.12.6 Combo Update: At the same time, ensure Homebrew & XCode utils are installed on your system from brew.sh Install pbzx, for extraction of update pkg Payloads. Brew install xz && brew link xz git clone cd pbzx clang -llzma -lxar -I /usr/local/include pbzx.c -o pbzx #Install pbzx to path mv pbzx /usr/local/bin/ Once the download has completed, mount & extract the update dmg. Open macosupdcombo10.12.6.dmg #Expand pkg contents to tmp folder. Pkgutil -expand /Volumes/macOS Sierra Update/macOSUpdCombo10.12.6.pkg /tmp/sierra/ cd /tmp/sierra #Extract payload contents to current directory pbzx -n macOSUpdCombo10.12.6.pkg/Payload cpio -i Move the firmware update package from the extracted files to a local path, we'll use the user's home directory. Mv System/Library/CoreServices/Firmware Updates/USB-C Multiport Adapter/adapterupdate1.pkg / Finally, execute the installer and reboot. Before you execute the installer - ensure that the Multiport adapter is plugged in, with nothing else plugged into it.
The macOS High Sierra 10.13.6 software update is only available for all of the new 2018 MacBook pro models, it it not available for any other versions of Appleās Mac or MacBook computers. Mac Mini 2.66GHz Mid-2010 4GB 500GB OS X High Sierra. 500GB Serial ATA hard disk drive. Includes Mac Mini and power-cord. Pictures are of the item for sale. Mini DisplayPort with support for up to 2560-by-1600 resolution.
Ensure that you have power connected to one USB-C port, and the Multiport adapter to the other. Apple's article recommends doing USB-C power-pass through, this did not work for me. You can try different configurations if this doesn't work. #Kick off the install sudo installer -pkg /adapterupdate1.pkg -target / #Then reboot sudo reboot If all went well, System Information should report your USB-C Multiport Adapter is at firmware version 2.33.