Pioneer has provided a script, for their devices, that allows you to force the driver to load, after restarting your computer. Once in this section, locate the name of the device you're having trouble with, and confirm the driver mentions 'Loaded : No' as per the Pioneer DJ DDJ-1000SRT example below: Given the symptoms can be quite confusing, it may help to open the macOS System Information application, ensuring your device is connected via USB, and turned on, then navigating to Apple -> About this Mac -> System Report -> Software -> Extensions. You may see the following messages in the status bar of Serato DJ Pro, after your Serato-compatible device appears to work with Serato DJ Pro, and you then restart your computer:

IMPORTANT: Users on macOS 11.3 Big Sur and below should not run into this issue. The issue will present itself the first time you restart your computer after installing the driver and will re-occur each time you restart your computer subsequently. NOTE: If you're having connection issues on macOS and believe you're not suffering from the issue above, please check out our Troubleshooting connection issues on OSX and macOS guide. The symptoms are not immediately obvious, as the first time you install your Serato-compatible hardware driver, whether from within Serato DJ Pro, or after having downloaded it directly from the manufacturers' website, your Serato-compatible hardware should connect to Serato DJ Pro without issue. We believe this issue is caused by a change made by Apple in macOS 11.4 Big Sur, and also affects macOS 11.5 Big Sur, and the way the operating system interacts with hardware drivers.

This issue will result in Serato DJ Pro being unable to connect to the specified device, after restarting your computer, even if the correct driver is installed and allowed.

We are aware of an issue affecting users on macOS 11.4 Big Sur and higher, which prevents device drivers from 'loading'.

Serato dj lite mac big sur