Hi hyprstack,
Thanks for reaching out in Apple Support Communities. I understand that after a few hours of use the USB-C port on your Mac stops responding and you need to disconnect and reconnect the dongle you're using in order for it to respond. I can see why you'd reach out about this behavior; I'd like to help. I'd recommend using the steps in this resource to reset the NVRAM on your Mac; this will also reset USB ports to their defaults and could help the behavior you're seeing: Reset NVRAM or PRAM on your Mac
I'd also recommend reviewing this information as well:
USB specifications all work with each other, but speed and power are limited by the cable or device that uses the earliest specification. For example, if you connect a USB 3 device to USB 2 port, your device is limited to USB 2 speeds, and it can't draw more power from the port than can be delivered over USB 2. In other words, to get the best performance, make sure that the USB port on your Mac and the USB cable to your device meet or exceed the USB specification of the device itself.
If your Mac doesn't recognize a USB device after you plug it into your Mac:
- Check all connections: Unplug the device from your Mac, then plug it back in, and make sure that all cables and adapters are securely connected at both ends. Test with another cable or adapter, if available.
- Plug the device directly into your Mac instead of a USB hub or other device, and if necessary test with a different USB port on your Mac or device.
- Some devices need their own software, such as drivers or firmware. Others work without additional software. Check with the maker of your device, and install all available Apple software updates as well.
- If your device came with an AC power adapter, use it. Some devices can be powered by the USB port on your Mac. Others need more power than your Mac can provide.
- Restart your Mac."
About USB on Mac computers
Let me know what you find.
Best Regards.
