Im quite new to DJ-ing and i have a DDJ-RZ which i run using my iMac... I've recently updated my mac to the most recent operating system and also rekordbox to the latest version. Now when i try to use rekordbox it loads up and recognises the ddi-RZ but when i click the load button to load a track nothing happens. The track name goes green like its been selected but the wave form doesn't load at the top and the track won't play at all.... I've tried deactivating and re-activating the license which hasn't worked and tried restarting my mac etc but nothing has worked.... any help would be much appreciated as I'm totally clueless.