Thanks for the replies.
Maybe you’re right about the Mac but strange thing is : I have the exact same behaviour after reformatting the card on the eclipse and re-installing the files on it on the PC, from a fresh download, so without any interaction with the Mac.
Tha’ts why I was wondering about a possible corruption of the files themselves.
One last thing I could try is reformating the card on the PC
Hmmmm…
