WD has warned users of their hard drive products that there may be risk of data loss when updating to Apple’s latest OS X Mavericks 10.9 update. WD is currently investigating reports from customers, and noted that the issues may be connected to the WD Drive Manager, WD Raid Manager and WD SmartWare software applications.
WD has strongly urged customers to uninstall these applications before updating to OS X Mavericks, or at least delay the upgrade.
As a precautionary measure for users who have already upgraded to Mavericks and are experiencing difficulty accessing their WD drives, WD recommends to not safe anything to the drive, disconnect the drive and contact WD Customer Service for assistance – http://support.wd.com/country/
WD’s software applications are not new and have been available from WD for many years.
On the personal front, I have upgraded to OS X Mavericks but have not attempted to access any of my WD external drives thus far. I use several MyBook Studio, MyBook Passport and a MyBook Passport Slim external hard drives.