I already installed the drivers but the interface is not recognized in the applications
Guitar Rig Mobile is not mentioned in the list of compatible devices for the HighSierrar OS so it is possibly not supported : Compatibility of Native Instruments Products on macOS
When I bought the guitarig mobile, along with the installation CD and Serial Number, in 2011/2012, it didn't say it would be valid. Even the Yosemite system works, but Native Access doesn't, only from High Sierra onwards, that is, either I use the mobile or I use Native Access. Bad situation because I'm a musician and I use this system and hardware, I was very happy with it, I live in Brazil, I'm poor and it's very difficult to keep up to date/slave here. I'm still waiting for a solution because I know it only depends on the good will of their market policies and mainly of their programmers. Native sounded sustainable, but I'm seeing that it's not.