Well scanner.inf is not much use to me. I use OSX 10.10.5 and 64 bit Photoshop CC 2015.
Vuescan should not conflict with other driver software. I can use the Mac drivers through Image Capture, but that's like Windows's own WIA, it's a sparse
interface.
Be aware that Silverfast works and will only work with one dedicated scanner you buy the license for. So not an option for me.
VueScan or Silverfast for scanning? - Photo.net B&W Photo - Film & Processing Forum