DDJ 1000 SRT will not start the Firmware Update Mode

Hi,

I´ve tired to update my firmware from 1.01 to firmware 1.05 on a MacBook Pro with High Sierra.

But the Updater breaks at 4% and i´m geting an error Message, that the USB is not conected (I am conected at port A). I´ve also tried to deinstall the audio driver first but it does the same. 

When i try to hold down the CENSOR and the 4BEAT button an POWER ON to get into the Firmware Update Mode. The Controller just starts black and nothing happens.

I really don´t know what to do. Can someone help me please.