Hello,
-Which version of OS X/macOS are you running?
-You may be able to contact ArcSoft to get your authorization code if you no longer have the documnetation that came with the scanner/PhotoStudio software.
Depnding on your current version of OS X/macOS, that software may or may not work. If your Mac does see your scanner, you could try using the Image Capture application in your Applications folder, as it has scanning capabilities. There are also other scanning applications that should work for you, like
VueScan from Hamrick Software. I use it myself with several models of scanners and love it.
C