I can't recall, does the Virtual Host feature work OK for you on your Mac/Safari?
(so handy that it really should be ON by default)
Yes, the web browser worked best for me also.
The virtual host feature does work on Mac in Safari but I still couldn't activate one of my cameras using this feature so was unable to access virtually in a browser. Not checked if I see the cameras as online in the 4200 software with the virtual host feature active as I turned all the settings to default when having troubles.