Pioneer Serato DDJ-1000SRT Mode D'emploi page 6

Installing the driver software on macOS
Mojave 10.14 / macOS High Sierra 10.13
A new security feature has been added to macOS Mojave 10.14 /
macOS High Sierra 10.13.
When installing Pioneer DJ driver software on these versions of
macOS, driver software authentication is required.
If you're installing the driver software for the first time and you're
using macOS Mojave 10.14 / macOS High Sierra 10.13, you need to
follow the steps below. If the driver software was installed on macOS
or OS X before you updated to macOS Mojave 10.14 / macOS High
Sierra 10.13, you don't need to follow these steps.
When installing Pioneer DJ driver software on macOS Mojave 10.14 /
macOS High Sierra 10.13, the following screen is displayed.
Click [OK] to allow the driver software installation.
The installation will finish.
1 Open [System Preferences], then click [Security &
Privacy].
2 Check that [System software from developer "Pioneer
DJ Corporation" was blocked from loading.] is displayed
at the bottom of the screen.
This is shown for 30 minutes after starting the driver software
installation.
If it isn't shown, repeat the driver software installation procedure.
3 Click [Allow] in the bottom-right corner of the screen.
4 If the unit is connected to your Mac, disconnect the USB
cable and connect it again.
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