Connect CASIO keyboard to Garage Band (USB MIDI) (driver?)

Well, I know this isn't a new question here, but I really can't find a solution for it. How can I connect a Casio Digital Piano (AP-33) to a Mac? After researching almost for a month, I noticed Casio don't do drivers for MacOS, however a guy back in 2009 made one that apparently worked. I tried to install it but it didn't work, it doesn't even appear in Audio MIDI Setup...

I used to had a Digital Piano Casio PX160 when I lived overseas, and it worked perfectly in Garage Band (connected through MIDI-USB). And now that I'm back home, my old Casio AP-33 can't connect to my MacBook Pro. It has Midi IN and MIDI OUT, I connect them to the piano and then to the Mac, but it doesn't work well.

In Audio MIDI Setup there is an "USB2.0 MIDI" that looks to receive some of the MIDI information, but not all of it. Like it just receive one note (if I play a few notes at once, like a chord, it just plays one of them in Garage Band).

I tried in other programs but it's the same issue. I also replaced the cable.

I hope you can help me to solve this. I wouldn't like to expends hundreds of dollars to buy a new piano that is compatible with MacOS.