No specific info about version 2.3. Please visit the main page of APOpen on Mac Informer.
An easy-to-use application designed to open, view and convert WMF files.
Open, view, and manage images and videos on your Mac.
It allows you to view interactively and move freely through 3DMF objects.
View Jupyter/IPython notebooks containing equations and narrative text.
Panotour Viewer lets you open .PTV files in an internet brower, offline.