Can't connect to USB to Serial Converter - FIXED Was working a couple versions of parallels back - flawlessly too. I just assumed parallels would keep getting better, not worse. I get the "device in use" message for two different usb-serial converters I need to use for my work. OS X is definitely NOT using them, and I have not installed any other new software that would be using them. Any ideas, or do I have to figure out which version of parallels to revert to? Edit: I DID find an OS X extension for a ftdi usb to serial adapter and removed it....usb to serial adapters now work in parallels. Of course this doesn't help anyone who needs to use a usb-serial adapter in os x AND parallels.