Some controllers may require the latest available drivers in order to be compatible with Serato DJ.
Click here, then select your controller to check if drivers are required. If they are required, there will be an available "Download Latest Drivers" button. This button will then take you to the hardware manufacturers website where you access the latest available drivers.
If there is no "Download Latest Drivers" button available for your controller, this means that no drivers are required.
NOTE: Sometimes drivers are required for Windows only, but not necessary for Mac.