After upload, my Mac don’t recognize Arduboy

Hi, I’ve an arduboy since two year, but yesterday, after uploaded a game (Mini Rogue) the Arduboy don’t appear on the Door List; I’ve tried with “recovery mode” but nothing.
If I connect my arduboy the red light is turn off after one second; with the recovery mode the red light is turn on, but my computer don’t recognize the Arduboy. I’ve the last version of OS X and the last version of Arduino (I’ve tried with beta version, but don’t change the situation).
I’ve tried with different computer and OS, but nothing.

I’m sorry for my English, thank you for the help

This should help, on the title screen hold down to trigger the bootloader.

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Thank you! Really thank you! I’ve resolved the problem! :smiley: