External Drives for Mac Experiencing Data Loss with Maverick OS -- UPDATED FOR NOVEMBER 6, 2013

Yes, I tried those things.  I even took it to another Mac that had never had an external HD connected and tried it there. Oddly, they were running Win7 in Parallels at the time, and Windows recognized the drive immediately, even though the Mac could not mount it for access. I also set up my Ubuntu workstation to mount HFS drives, but it would not see the drive, either. Since I’m questioning whether it’s a .kext or a USB issue, I still lean toward removing the drive from the case and giving it a go with someone else’s USB hardware, or possibly bypassing USB altogether and seeing if it will mount as a SATA device. That’s a bit harder to do with a Mac, though, so I’m still hunting for a better alternative, like a newer .kext. Thanks.