Trouble Unlocking Bootloader on Android Device (RCA Voyager Tablet) Okay, so I've figured out how to set up ADB on Mac OS X and I've followed all the instructions on how to get to Fastboot from ADB. The last command I use is:


  fastboot oem unlock


This command in ADB is supposed to unlock the bootloader.  On my device, it asked for confirmation to unlock the bootloader, volume up is yes and volume down is no.  Well, the "no" option works perfectly fine but then the "yes" option does absolutely nothing on the device or the terminal window.  

Does somebody know what's going on? I can seem to figure it out, even though I've searched all over the internet.

Some sites say that you have to take the device off of the charging cable before booting into fastboot, but I've tried this and found it unsuccessful.

My device is running Android Lollipop.  All the developer settings are enabled like they're supposed to and ADB commands all work until the point where I get stuck.

EDIT: I'm attaching a screenshot of what my developer settings page looks like.  I can't find the OEM setting anywhere.Image
Do you have the USB DEBUGGING CHECKED BOX ON. I know USB DEBUGGER has to be on. Theres also a box about ADB/ADT make sure that is checked along with the setting install from unknown locations has to be on for 3rd party apps other than the ones from google play. It sounds like that is all that has to be on in your settings under Accessibility and under Developer options in your Settings menu.
Your other question about your volume up and down button. You need to shut your phone off then hold down on volume button and power button at same time until you see the Android bootloader settings pop up on screen then let go, somme samsungs you also have to be holding down on the menu key as well as power key, volume down.all at same time till bootoader then hurry let up