I am using Android Studio 2.3 on Mac Sierra and I could not find Hierarchy Viewer when I open Device Monitor. There is no viewer on the perspectives list. Does anybody know why is that?
Can't comment, no rep.
After updating to the latest build tools, hierarchy viewer and a bunch of other stuff was removed from the tools directory. I downloaded the tools separately from the Android Studio download page and it included the hierarchy viewer. Not sure what's going on, but it seems updating build tools in Android Studio removes the hierarchy viewer.
Edit: Hierarchy viewer is listed under the deprecated features from Build tools 25.3.0
http://tools.android.com/recent/androidsdktoolsrevision2530feb2017