BUFFALO
IMPORTANT NOTICE
for Customers using the Network-USB Navigator on MacOS X 10.11 El Capitan
The Network-USB Navigator does not support Mac OS X 10.11 El Capitan.

When updating the OS to Mac OS X 10.11 El Capitan, please uninstall the Network-USB Navigator by following procedures because it doesn't work in Mac OS X 10.11 El Capitan.

We had announced that if the Network-USB Navigator is installed on the Mac PC, the OS may not work properly. However, we have tested with the official public release of OS X 10.11 El Capitan and confirmed that the OS works without any problems.
 
Uninstall the Network-USB Navigator.
Note: Start up in nomal mode, not safe mode.

1. Open a Safari window and download the file "Network-USB Navigator Uninstaller" from the link below.
http://buffalo.jp/support_ap/support/products/usbst-uninst.html

2. Double-click the downloaded file.
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3. Double-click "Network USB Navigator Uninstaller".
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4. Click [Open].
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5. Click [Yes].
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6. Enter the password used for login if required.
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7. When the screen below is displayed, click [Restart] and confirm if your Mac starts up normally.
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Note: The Network-USB Navigator will not support Mac OS X 10.11 El Capitan.