android - adb devices works but adb logcat shows "waiting for device" [using Kindle device on Mac OSX] -

when type in "adb devices" -> lists device connected when typed in "adb shell" or "adb logcat" -> shows "waiting device"

• used same device on friend's laptop, works good
• changed usb cord
• tried killing adb server, restarting server
• developer options -> enabling usb debugging
• rebooting device
• remove adbkey , adbkey.pub
• "ddms" in adt bundle works, adb logcat doesn't

already tried listed at: adb logcat hangs "waiting device" message

android studio - stuck @ waiting device