I just upgraded to Maverick 10.9.2 and my external hardrive (Toshiba Canvio Basic 3.0 Portable Hard Drive, PN#HDTB210XK3BA) is no longer appearing on my desk top when I plug it in. It shows in the Disk Utliity and I have tried doing a verify as well as a repair and I stilll get the same message...
"Updating boot support partitions for the volume as required."
I did a backup just prior to updating to Maverick so I know the external drive still works. Plus I am able to see the files on my PC when I plug it in to there.
I did try resetting the SMC and the NVRAM/PRAM.
I plugged other externa; drives in (Maxtor, Seagate, etc) and again they did not show on the desk top but did show in Disk Utlity.
I see this has happened to several folks but am wondering how they got it fixed.