Speaking in general, there are no driver installations necessary in order to use the hub in macOS or Windows.
If the PC you are connecting the hub to is running Windows and has Thunderbolt 4 or Thunderbolt 3 technology built-in, when you first connect the hub you may be prompted to ‘Approve’ or ‘Authenticate’ the device via the Intel Thunderbolt software that should already be installed on your Windows PC.
We have a video that demonstrates how to ‘Approve’ the device using the two different types of the Intel software (known as either the ‘Intel Thunderbolt Software’ or the ‘Intel Thunderbolt Control Center’) here → https://youtu.be/aRN2aEzmsyo
Depending on how your Windows PC is configured, the Approval process may happen automatically and as a result you may not be prompted to Approve the hub.
** Note - we have had reports that the hub needed to be manually Approved when used with some Windows Thunderbolt 3 systems before USB devices connected to the hub would function properly. If USB devices are not working properly via the hub, please check the Approval status and manually Approve if necessary. Please note that the USB4-HUB3A is officially supported in conjunction with Windows PCs that have Thunderbolt 4 technology built-in. **
If the PC you are connecting the hub to is running macOS and has Thunderbolt 3 or USB4 technology built-in, the approval process will happen automatically.
If the PC you are connecting the hub to has USB-C technology built-in, the hub does not need to be approved (device Approval is not part of the USB-C standard).