It is assumed that you have already tried to install the driver, so you need to check the Kext_policy database to see if the driver is being blocked from loading. On this sample screen, you can see the LT-TB is showing up as pci1621,14 and the driver is not installed. Next, check under PCI to see if the LT-TB or LT-TB3 shows up as a PCI device: ![]() If the cabling is correct and the device is powered up, on the LT-TB check that LED D30 is flashing on the LT-TB3 check that LED D1 on the wrap-around board is flashing. ![]() If not, check your cabling and that the device is powered up. You should see LT-TB or LT-TB3 listed under Thunderbolt/USB4. Launch System Information (Applications > Utilities > System Information)Ĭlick on the Thunderbolt/USB4 under Hardware: ![]() Early versions of Big Sur would not load kernel extensions properly, so trying to install the driver on a system without the latest updates from Apple would be pointless.Ĭheck and make sure you have the latest version of Big Sur.Ĭlick on the Apple icon, then select System PreferencesĪllow the system to update to the latest versionĪfter the operating system is completely up-to-date, please follow these step by step instructions to check the installation of the driver on macOS 11 Big Sur.įirst, check and see that the Thunderbolt device is being seen by the operating system. It is imperative that you start by updating macOS 11 Big Sur to the latest version.
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