Hello everyone, suddenly part of my Arduino boards are disappeared in the USB board list of IDE. A lot of attempts are already done and failed : Installed FTDI drivers and removed, installed the CH34X and removed, Arduino SAM boards driver ETC...
Notice that there is no relation with the genuine or not boards (example: a MEGA (no brand) is working and a Leonardo genuine is not working
On 2 different partitions (MAVERICKS\EL CAPITAN) the issue is the same... something damaged in the kernell?
Thank you very much