Weird popup when my iPhone Xs is plugged into my iMac

[212rikanmofo]

I am running Mojave 10.14.1 Beta 2, and I noticed this strange pop up saying something about my iPhone needing to download special software in order for iTunes to detect and use my phone. So I tried to download and install it but it keeps failing. I've never seen this message before and not sure if it's showing because I updated my iPhone to iOS 12.1 beta 2 or Mojave 10.14.1 beta 2.

Does anyone else get the same message? Why can't I update?

 

[Lilydgg]

I did yesterday, Im on 10.14 and plugged in my XS. The download worked for mine though.
The message said
Software update is required to connect to your iOS device

 

[212rikanmofo]

Strange, the update keeps failing every time I try to download the update though. Will try again later, hopefully it works.