Yamaha P125 connectivity

Hi fotografiesneokyma

Welcome to the Apple (user-to-user) Community.

Re: "Process connecting the P125 to MacBook Air. Trying to connect to GarageBand".

Wondering if the Yamaha P125 uses bluetooth or needs a cable for connection,

and

Which Mac OS version is installed on your MacBook Air.

Apple Support have a GarageBand user-guide online

macOS app user guides: GarageBand for MacUser Guide – Apple Support

If you click the "Table of Contents" at the top of the "Welcome" page,

you will see various topics, leading to detailed articles that may helpful.

For accurate info.:

Choose the Garageband version that is installed on your MacBook Air at the top of articles.

Eg: For GarageBand version 10.4.7

Change Audio/MIDI settings in GarageBand on Mac – Apple Support

Noticing Yamaha have "Specs" for the P125 online"

https://au.yamaha.com/en/products/musical_instruments/pianos/p_series/p-125/specs.html

This is Yamaha's "Ask an expert" Webpage:

https://au.yamaha.com/en/products/musical_instruments/pianos/p_series/p-125/ask_an_expert.html#product-tabs

On YouTube:

There's a 1 min "how to connect" P125 to computer video (if you don't mind ads:)

https://www.youtube.com/watch?v=TRlLlRzfDlo

Hope something here helps.

All the best :-)