A few years ago I installed the Android File Transfer app to transfer files between my Nexus 7 version 6.0.1 and My Mac, OS 10.9.5 (Maverick). It worked great then. In the past few months I just get a pop up saying it cannot connect. I've tried rebooting, disconnecting and reconnecting and downloading the app again. Still I cannot connect or see my Nexus. What is the newest version of Android File Transfer? I have only been able to find a 2012 version.