device usb problem

Hi everyone - I'm trying to start over b/c I was having a LOT of trouble with 10.11.4 My brother (an IT guy) made me a bootable usb with latest UniBeast and El Capitan 10.11.1 (YAY!) But now new problem: • I power on and push F12 • Screen shows me an option to choose my usb boot disk. I choose...

Hi all, I recently intalled Yosemite on my system. The usb is working when I connect my pendrive and transfers data normally but when I connect a device it shows in the USB tree in systems report but when I select the device it says iPad: Product ID: 0x12ab Vendor ID: 0x05ac (Apple...