1. Download and install ScanSnap manager for the Mac V22L12 (S300M, S500M, S510M package)
This is their page http://www.fujitsu.com/us/services/computing/peripherals/scanners/support/sl_download.html
Here is the direct link to V22L12 http://www.fujitsu.com/downloads/COMP/fcpa/scanners/drivers/ScanSnap_V22L12_S510M_S500M_S300M.dmg
2. Mount the DMG file, copy contents to desktop.
3. Right click on “Show Package Contents”.
4. Expand “Contents” then “Resources” folders.
5. In “Resources” open “InstallationCheck” in text editor
6. Create a new line after “#!/usr/bin/perl” and type “exit(0);” (without quotes) and save
7. Install the modified V22L12 package from the desktop.
8. ScanSnap manager should start immediately – quit the program, it’s an old version and wont connect to the scanner, indicated by gray scanner icon.
9. Download and install ScanSnap manager for the Mac V30L20W (S1500M driver package)
This is their page http://www.fujitsu.com/us/services/computing/peripherals/scanners/support/sl_download.html
Here is the direct link to V30L20W http://www.fujitsu.com/downloads/COMP/fcpa/scanners/drivers/ScanSnap_V30L20W_S1500M.dmg
10. Mount the DMG file, copy contents to desktop.
11. Right click on “Show Package Contents”.
12. Expand “Contents” then “Resources” folders.
13. In “Resources” open “InstallationCheck” in text editor
14. Create a new line after “#!/usr/bin/perl” and type “exit(0);” (without quotes) and save
15. Install the modified V30L20W package from the desktop.
16. ScanSnap manager should start immediately, this should be the working version with the white “S” on a blue background.