Hallo there! For the first, here is my system: - MacBook Pro, late 2015 (no dedicated graphics card) - Mac OS Sierra 10.12.4 - Akitio Thunder 2 (with additional 650 W power supply) - Nvidia GTX 980 ti And now my problem: After about half a year my eGPU setup suddenly stops to work. When I start my Mac with connected gpu up, the boot process crashes. Some days ago I made an update from 10.12.3 to 10.12.4 and update the NVIDIA web driver. After this my setup works just like befor. It was not the first time I install an update. But today everything goes down. Here are my vain try's to repair the system: 1. reinstall automate-GPU; Automate recognition the graphic card but the mac still not boot 2. Try to use automate-GPU "-a" mode 3. Disable csrutil in recovery mode 3. Play back old timemachine backup (SAME PROBLE, THE MAC DOES NOT BOOT!) 4. Install clean Mac OS from recovery (does not work to..) All this measures have brought nothing... Do someone have the same problem like me? If someone has a ideas what to do, please let me know. Thank you!