Even if it is not shown, for new installations the user must enable the kernel extension to use the DisplayLink product.Īvailable by choosing System Preferences from the Apple Menu and then clickingįollow Figure 3 - Figure 5 to enable the DisplayLink Software to run on the system. Important: This warning is not always shown. A new installation can be run to reset this timer.Īt the end of the installation, the operating system should display a "System Extension Blocked after installation" warning and ask the user to enable the DisplayLink extension( Figure 1): Please note: It's only possible to enable the system extension in the 30 minutes following the installation. If this is set to "No" then the KEXT is blocked and needs to be enabled following the steps below. See the screenshot below, which shows the KEXT blocked. You can check if the DisplayLink KEXT is blocked by opening the System Report (Apple menu -> About) and select Extensions on the left pane and look for DisplayLinkDriver.kext. How to check if the DisplayLink KEXT is blocked If you are using the classic DisplayLink USB Graphics Software for macOS (version 5.x), you have to explicitly enable this system extension in the Security & Privacy system preference after installation before DisplayLink software is allowed to run.
This article does not apply if you are using DisplayLink Manager 1.x and macOS Catalina (10.x), Big Sur (11.x) and Monterey (12.x) The new DisplayLink Manager Graphics Connectivity app (version 1.x) does not use KEXT.
The DisplayLink classic driver installation (version 5.x) includes a system extension (DisplayLinkDriver.kext) that is affected by this policy. Since macOS High Sierra 10.13, the operating system applies a stricter security policy to software that requires kernel extensions (KEXTs).
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