Hey guys, I'm no stranger to Android but, I'm dealing with my first Nexus. So far, pblbplbplbpblpltlttt!!! Ordered & received it in January. Transferred data from my Droid Maxx just fine. Received my January OTA. Then nothing after that. So here I am, in late March with no Feb OTA, no March OTA. So I have to sideload, fine. Downloaded Android SDK. Copy adb & fastboot along with Feb OTA zip file into a separate folder. Hookup Nexus 6p to Macbook Pro (Running El Capitan). Navigate to correct folder using terminal window. Execute a ./adb devices command to certify that it's reading my phone, everything checks out. Great. Run ./adb reboot recovery command, phone reboots to recovery mode, I select Apply update from adb & phone askes for sideload zip. So I enter the command ./adb sideload blah-blah.zip aaaaaaaand sh!t. no device found. I execute the ./adb devices command at this time, & whadda ya know... sh!t no device connected... wtf. USB debugging is on. I'm using MTP protocol under Networking. Two hours & I'm tired of this, & now I'm on a forum. Anyone have an idea?