None of the suggestions worked for me (I am installing the actual update, not the beta). At this point I've downloaded the update 5 or 6 times. I am giving up.
masterov
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> The FTDI driver and/or custom ID wrapper KEXTs can be manually loaded using kextutilHow do you do that? I tried "kextutil DriverKit.AppleUSBFTDI.dext" but that didn't work.
Installing 3rd party drivers does not solve the issue. I tried Prolific and FTDIUSBSerialDriver_v2_4_2.