I want to use Keynote.app on my iPhone to operate a Keynote presentation on my MacBook Pro. In order to do that, both iPhone and Mac needs to be on the same Wi-Fi network. But sometimes, there is no Wi-Fi available or it is really unreliable.
I used to solve this by creating Wi-Fi access point on my MacBook. But with macOS High Sierra, it looks, that you cannot create proper Wi-Fi access point without tethering Internet connection. Because, in case I am not connected to ethernet, after creating the Wi-Fi access point in MacBook, I can see it on my iPhone in the list of available Wi-Fi networks, but it says, it has no Internet connection. So even if I try to connect to it, it shows this little tick icon next to the name of the wi-fi, but there is no Wi-Fi icon in the iPhone status bar. And it acts like it is not connected to the Wi-Fi as I am not able to manipulate the presentation through the Keynote app.
The same counts if I want to control some game with my iPhone (like Real Racing 2, which needs both iPhone and Mac to be on the same Wi-Fi network).
Is there any chance to creating a Wi-Fi access point on MacBook that is not otherwise connected to the Internet? I have tried searching for a solution on StackExchange and on the Web but to no avail.