Upgrade the Brother 64-bit OEM version can resolve the problem.

http://download.newsoftinc.com/nai/NTC/PMG/brother/64/PM9SEInstaller_BR_Multilang2.dmg

Note the 64-bit application requires for 64-bit TWAIN/ICA driver. Otherwise, the software will not recognize your device.
 

For 32-bit application please follow these steps to correct this issue and note the process will reset Scan button settings.

1. Closed the Presto! PageManager 9 application and Scan button application.

2. Go to folder “/Applications/Presto! PageManager 9 for BR/Presto! Scan Buttons 9.35.app

3. Click right mouse to show package contents.

4. Go to “/Contents/Resources/” and delete “en_US.lproj”

5. Go to folder “/Users/user name/Library/Preferences/PageManager Preferences/PM9.35/”

6. Delete ScanButton folder.

7. Re-launch Presto! PageManager 9 application and Scan button.

You can refer to the video tutorial for more information. http://download.newsoftinc.com/nai/NTC/Video/PageManager/PMSBFrench.mp4

If the problem still occurs, please include the following information so we could investigate the problem.

1.OS version & Language:

2.Software & Version:

3.Input Device Name & Model:

4.Error Message (screen capture is better):

5.Detail Problems (step by step):