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I am having massive problems getting a Nikon Coolscan IV recognised on an XP VM running (now) on Sierra with 8 GB of RAM. When I plug the usb cable in, nothing is recognised.
With a lot of playing around, installing software & drivers, booting reinstalling, reinstalling rebooting ad nauseam, I can finally get the VM to see the scanner, as an IOUSB device in the bar above the OS window (and that connection is automatically connected to the VM, and appears in device manager), but then, NikonScan 4.0.2 just reports that there is no scanner connected.
I got so desperate that I used a few-months old backup of that XP VM on a 2008 Macbook running El Captain with 4GB. INCREDIBLY, immediately I installed the nikon software, the same VM on the McBook sees the USB connection properly as a USB device, identifies it as an LS40 and connects it to NIkonScan without problems! The scanner then works fine. And I installed Mint 18 Mate on the Macbook, which also see the scanner and lets it work immediately with its internal scan app, even without drivers
So I deleted the whole XP VM from the MBP and replaced it with a carbon copy of today's Macbook xp VM. Both computers have the latest version of Fusion
With completely unchanged results. No recognition of the scanner whatsoever. (and when I opened a voyager linux VM, it couldn't see the scanner either, and nor could a Windows 7 VM??)
I also get the impression that the older Macbook runs VMs faster and more stably than the newer, faster MBP which has significantly more memory??
Is there something i am missing or is there some reason why the old Macbook Fusion installation can see the scanner while the newer MP cant?