Macbook 2015 12inch Retina with USB-C

[Carlo]

Originally Posted by wahlfeld

Not good that you're seeing issues too but it does make me feel better than it's a genuine problem and not something wrong with my device. It's great to see you and team working on this Carlo! I managed to get my hands on another USBC adapter to USB3/HDMI/SD card etc (forgot to check the brand) but I experienced the exact same behaviour as mentioned in my previous comments.

Keen to hear how you go with the 2015 Macbook testing.

Curtis

OK so this has not been too easy for Kamil who tested here. This configuration is quite flaky in our tests.

There is definitely an issue. What we see happening connecting a USB 3 device to the Apple adapter connected to the MacBook is that sometimes only the USB2 part of the USB hub in the dock is enumerated.

Interestingly the OS then tries to re-enumerate and sometimes succeeds after 1-2 minutes. And sometimes the whole USB bus hangs. By inserting "slowly" the USB 3 cable in the adapter the chances of success increase (probably the adapter is sensible to the VBUS timing).
After noticing this, we went back to the 2016 MacBook and saw that the same was happening but the recovery is always succeeding for that model.

This is reproducible with other USB 3 devices so I'm not sure Targus could do something about it.

So not great unfortunately.

In your situation a possible workaround could be to use a USB 2 cable between the Apple adapter and the dock. This would be more reliable.
You would lose bandwidth but up to two 1080p screens it should be fine: we don't needlessly waste bandwidth as other technologies do (ahem...).

Best regards,
Carlo