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At random times the USB devices connected to the mac though a usb-c hub would just lose connection and stop working all at the same time. This happened with two different USB-C hubs (both expensive, one of them is Satechi which was recommended in many threads), so I am leaning towards ruling out the hubs being at fault.There are many other similar complaints about disconnection and freezing issues when using USB 2.0 accessories that connect to a Mac through a hub, though there seems to be no clear pattern as to which accessories are affected or when the issue occurs, making it difficult to determine what could be causing the disconnects.
I'm connecting a few things in the hub - HDMI for an an external monitor, USB audio interface (powered by the mac) and a mouse. When the issue occurs, the mouse and the USB audio interface stop working, but the HDMI connection continues to work without issues, each time.
The issue happens at random moments and there are no steps to reproduce it. It seems to be happening more often when at least two usb devices are connected at the same time.
Apple has a USB 2.0 issue with either the chipset they are using, or a Catalina bug regarding the handling and refreshing of USB 2.0 devices.Multiple MacBook Pro and MacBook Air owners have contacted Apple so Apple may be aware of the issue and could have a fix in the works. Apple has been replacing some affected machines with new models, but users report that the problem persists even when a new Mac is provided.
However this can be worked around.
USB-C hubs vary in their functionality and there are two types:
1. USB hubs that are transparent proxies
- The Anker, Satechi and StarTech hubs
2. USB hubs that are terminating proxies
- The CalDigit hub and anonymous person on the internet and their monitor hub
Transparent proxies take the USB 2.0 input and present it as USB 2.0 to the MacBook Pro. The Mac or Catalina then will do something wrong and the USB 2.0 devices will freeze / become unresponsive at some point (minutes or hours after being attached).
Terminating proxies take the USB 2.0 input, terminate it, and present it as a fresh input that is USB 3.0 to the MacBook Pro. Everything is good in this scenario.
Twitter is where you go to talk about what's happening. Over the years, photos, videos, gifs, and extra characters have allowed you to add your own flair and personality to your conversations. But sometimes 280 characters aren't enough and some conversational nuances are lost in translation. So starting today, we're testing a new feature that will add a more human touch to the way we use Twitter - your very own voice.Voice tweets can be created by opening up the tweet composer and tapping the new wavelengths icon. From there, a screen opens with a user's Twitter icon, which can be tapped to begin a recording.