Question marked as Top-ranking reply User profile for user: TheLittles TheLittles User level: Level 10 197,781 points Apr 25, 2020 9:26 PM in response to emmafromboisbriand emmafromboisbriand Said:"USB not working: One of the USB on my macbook air 2018 is not working, how can I fix it?"-------Reset your SMC and your NVRAM:Sometimes changes are made to the system and then settings (i.e. for USB ports) become manipulated, technically. So, reset both on your Mac. Show more Less Reply Link