Thanks for the update! Is it available in the current 0.17 GitHub release? https://github.com/FreeCAD/FreeCAD/releases
I tried the Qt5 OSX version, and opening the Addon manager throws:
Running the Python command 'Std_AddonMgr' failed:
Traceback (most recent call last):
File "/Applications/FreeCAD.app/Contents/Mod/AddonManager/AddonManagerGui.py", line 11, in Activated
File "/Applications/FreeCAD.app/Contents/Mod/AddonManager/AddonManager.py", line 584, in launchAddonMgr
if QtGui.QMessageBox.warning(None,"FreeCAD",QtGui.QApplication.translate("AddonsInstaller", "The addons that can be installed here are not officially part of FreeCAD, and are not reviewed by the FreeCAD team. Make sure you know what you are installing!", None, QtGui.QApplication.UnicodeUTF8), QtGui.QMessageBox.Cancel | QtGui.QMessageBox.Ok) != QtGui.QMessageBox.StandardButton.Cancel:
type object 'PySide2.QtWidgets.QApplication' has no attribute 'UnicodeUTF8'
The Qt4 version failed to open completely.