Also on MacOSX sometimes you need to play with the reset button, but it always uploads, sooner or later.
However, the last error you have has nothing to do with it. Apart that the example your are trying to run is not LoRaWAN but LoRa, on the BSFrance board I use LMIC examples without issues (except memory when I try to do too much) from here. You may find specific info on the board in this thread.
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