Problem: An error occurred trying to detect the flash drive part of a Dinkey FD on Mac OS X. This error can occur under the following circumstances:

1) The flash disk has been ejected (by clicking the Eject button in Finder for example) but the Dinkey FD dongle is still attached to the Mac.

2) This can occur in OS X 10.11 El Capitan (or newer) due to a bug introduced in El Capitan. In this case you should update your Dinkey Pro/FD SDK to version 7.1.1 or higher and use that SDK to produce a new locked copy of your protected software. It is not necessary to reprogram any dongles.