Finally USB to switch off

Nowadays everything goes via USB, because USB is often used only as a power supply. To permanently run accessories with the computer that are not actually used. However, since the pull out all the power, the computer come mnchmal in supply shortages.

Not anymore: Just this switch between insert and already running (by manual switch) only the accessories what is actually needed.

For me there was a problem with a Reiner SCT Smart Card Reader on my MacPro. Who are the boot phase drawn together with other devices drawing too much power and has crashed constantly. Now I turn it on only when I really need it. Since the other devices have already booted at this time and no longer pull so much power, so there's no more problems.