Select (or System Settings > General > About on newer macOS versions). Click System Report . Under the Hardware sidebar, click on USB .
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Pioneer DJ (now AlphaTheta) maintains legacy drivers. Do not use a generic "USB audio driver." You need the specific PioneerDDJ_SB2_ driver. ddj-sb2 rekordbox driver mac
Toggle the switch to to allow Rekordbox to access your audio devices. 4. Controller Decks Control the Wrong Rekordbox Decks Select (or System Settings > General > About