Do Macs have a USB limit? I have a 2010 era 27" iMac. It has the 4 USB ports from the factory. I have 6 external drives, a scanner, a printer and a Blu Ray burner, plus iPad, iPhone and iPods that are occassionally connected for file transfers. My issue, is if I power up any of the externals, printer, scanner etc., either they won't work or they kick one or more of the external drives off the system. I run two USB hubs that are self powered and thinking it was a hub problem, tried several different brands of hub. All have been self powered and the problem persists with every hub.
And, I don't know if this is related, but I recently suffered a power failure after which the system wouldn't see the scanner until I switched USB cables and swapped it around different ports, to reset it. As well since the power failure, adobe Bridge seems to stall when I try to browse the external drives, yet Finder will go to the same drives and browse files without issue.
And, I don't know if this is related, but I recently suffered a power failure after which the system wouldn't see the scanner until I switched USB cables and swapped it around different ports, to reset it. As well since the power failure, adobe Bridge seems to stall when I try to browse the external drives, yet Finder will go to the same drives and browse files without issue.