Hi, the 3TB HD on my iMac has now split itself in two and I am unable to resize either piece to put it back as a whole drive (I can't select anything as everything to do with partitioning the drive is greyed out). As can be seen the name of the HD has also now changed to Virtual Whole Disk, any help on this error would be greatly appreciated.
In case anyone else has this problem and wonders what happened, it's not great news. I took LowLuster's advice and I spoke to Apple and they resolved the problem for me (it took quite a few hours). Unfortunately the steps taken were too long for me to remember, so if anyone else has the same problem the best thing that you can do is speak to Apple.