If it is helpful, I am using QGIS 3.4.3 (Madeira) and MacOS High Sierra v10.13.6
I am trying to install a QGIS plugin manually, I've been using the instructions from the PyQGIS Programmer's Guide by Gary Sherman. I've also found several helpful threads on stackoverflow such as:
How to Install QGIS 2.6 plugins offline (Though I am using version 3.4)
I've created a plugin on a local drive using the Plugin Builder.
I have compiled the resources file using the following (in the terminal) which is straight from the QGIS documentation
pyrcc5 -o resources.py resources.qrc
and I copied my plugin directory to my QGIS plugins directory. Here is a screenshot of my directory, with some other plugins I've installed using the Plugin Manager. My test plugin is called "whereisthis":
The book states: "You should now see your plugin in the list of installed plugins". But it is not there.
According to the other stackoverflow threads which I referenced earlier, I have reloaded my repository, I have enabled experimental plugins, I have rebooted QGIS and my machine (several times).
The plugin is also not in the "Invalid" tab of the Plugin Manager:
Is there something else I am overlooking?