With slow fading blue led looks like you are in bootloader mode and no firmware loaded.
Quote from: f5soh on October 28, 2015, 03:55:21 pmMaybe :- Disconnect board- Hit Upgrade&Erase button- Connect boardJust tried that and... It worked! . Can connect on both OS platforms now. Was that simple!Thanks for your help
Maybe :- Disconnect board- Hit Upgrade&Erase button- Connect board