Just open new box iMac Retina and WD TB Duo, try to install WD TB Duo into JBOD (one for Data, one for Time Machine). After select and click format from the WD Drive Utilites, it format normally. But, both drives just show up a moment, then unmount by itself! I try to mount it by Apple Disk Utility, it show up, then unmount again…
Anyone try this?