Only 1 CDJ 900 is detected on my Mac.

Hello, I have the exact same problem as this post which was solved by changing the cable, but in my case this doesn't resolve it so I need help to find the reason.

Post: https://forums.pioneerdj.com/hc/en-us/community/posts/204144095--SOLVED-Having-issues-with-Traktor-Pro-2-and-Advanced-HID-mode-in-CDJ-900s 

I have 2 CDJ 900, both with the last firmware.

When I connect both to the computer and open the CDJ Agreggator only one appears.

I've tried to switch ports, cables and restarting the computer, but I can't get to get my mac to recognize the second one, they have both the same configuration.

The CDJ that my computer recognize works perfectly with Traktor, so i don't get why the other one not even in my MIDI Configuration settings won't appear.

Is my USB port from my CDJ broken ? Even if i never use it before ?

If someone can help, thank you very much.