Solving a VPN Connection Problem with VPN Enabler on macOS Mojave

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This solution probably applies only to systems that were previously running macOS Server to provide VPN services.

The system I’ve been using to run Indigo for home automation has been stuck on High Sierra, due to the removal of support for the VPN server in the macOS Server application under Mojave. But running an older OS isn’t ideal, for several reasons, so I started searching, again, for a method to provide VPN services under Mojave.

After some brief searching, once again, I found positive reviews for VPN Enabler, a handy, low-cost tool ($15) that provides a GUI for the built-in VPN server in Mojave. The VPN services are still present in later version of Mojave; Apple simply removed the ability to administer it from the Server application (the Server application doesn’t work at all in the latest versions of Mojave).

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Macs Unable to Connect to Wi-Fi After Changing Network Mode (Cisco Wireless Router)

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One day, while modifying the wireless settings for our Cisco wireless router, I discovered a rather stupid problem. It surfaced when I changed the Network Mode for the 5 GHz network from Mixed to Wireless-N Only. This seemed to make sense since we don’t have any devices using Wireless-A. This is in reference to 802.11a in case anyone was wondering if I had actually meant 802.11ac, which my current router does not support.

And that’s the moment when I was disconnected from Wi-Fi and unable to reconnect. Two different Macs (one MacBook Pro and one MacBook Air) were unable to connect. Once again, I resorted to searching and found the solution. It seems, that for whatever unknown reason, when Wireless-A is disabled on my router then all Macs will decide that they require a different feature enabled in order to connect. In this case WMM (Wi-Fi Multimedia).

The reason for this seems more absurd considering that the support doc implies that it must be enabled in the first place but, before changing the Network Mode, those devices connected just fine with it disabled.

Enabling this capability on my router solved the problem. I’m not sure why. It doesn’t seem to be a feature that should be required simply to connect to a wireless router but there’s no question that enabling it resolved the problem. More details are available via the linked support page included below:

Wi-Fi: Unable to connect to an 802.11n Wi-Fi network