XDJ RX2 not connecting to PC

Hey guys I need some help, out of the blue whenever I connect my Mac to my XDJ RX2 and press the MIDI mixing button my controller will not read my Mac, instead, both decks will say "PC" on the screen when I push in the load button and I am unable to mix with rekordbox. The program recognizes that it's there but it just doesn't work. Ive had this mix for over a year and this is the first time I have not been able to troubleshoot this problem. IDk what to do.