This might be the case with the update to macOS Big Sur as well. In other cases, a new driver version was required. In some cases the driver of the USB serial adapters just needed to be reinstalled after the OS update. USB driver information for older macOS releasesĪfter past OS updates, some customers reported that direct no longer worked after the upgrade.
Many questions of our customers can be answered with this information. In addition, we have collected all information that we know about the USB serial adapter drivers on this page. Please always contact your vendor where you purchased the adapter, or the adaptor's manufacturer. Do you use direct with a Tiptel phone with serial interface that is connected to your Mac via a USB serial adapter?īecause of the large number of available USB serial adapters, we cannot support these adapters and their drivers.
