Has anyone faced any issues with the external hard drives or pen-drives not being detected on a MacBook that has been upgraded to macOS Sierra 10.12?
I own a brand new MacBook Pro 2016 and many external devices are not working or not even recognized anymore. For instance my Presonus audiobox USB audio interface is not working anymore.
I contacted Presonus and they told me it has to do with lower power to the USB ports. Supposedly Apple is trying to extend battery life this way.
No. This isn't a known issue on Sierra. Im sure you and some others are however seeing problems after the upgrade, but I would expect it to be a coupincidence and not a cause that you upgraded.