Official comment
Try disabling the firewall; this is the most common reason it won't work.
Also verify that there are no devices / drivers listed in the System Information application under Software > Disabled Software.
I have:
downloaded latest driver
downloaded USB CONNECTION (LINK Export) DRIVER FOR MAC EL CAPITAN OR LATER
updated firmware on XDJ-RX2
Downloaded newest Rekordbox 6.0
I hook up XDJ-RX2 and can see the audio is connected to unit on laptop but when pressing Rekordbox I don't see any communication. I see the laptop but not tracks. The tracks don't play either. Please help.
Laptop is Macbook Pro MACOS 10.15.4 Catalina
Last note: I tried this once before a week ago and everything worked fine.
Try disabling the firewall; this is the most common reason it won't work.
Also verify that there are no devices / drivers listed in the System Information application under Software > Disabled Software.
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I checked those things as well. Firewall is off. The driver was in disabled software folder. I fixed that, but still not working. Please help further. I will say again, this set up worked once before and when I hooked up a week later, this problem persisted.