Inverting target volume APFS inverter failed to invert the volume resource busy osstatus error 16
Trying to clone late 2013 iMac 14,2 internal Apple 500GB SSD to single drive of External USB attached 1TB SSD partitioned into two 500GB drives.
Getting following message:
Inverting target volume APFS inverter failed to invert the volume resource busy osstatus error 16
when drive (of external SSD) is setup either as GUID / OS Extended Journaled or as APFS.
Never before had a problem cloning internal Apple drive to external drive using Apple's Disk Utility, until upgraded iMac to High Sierra. Which resulted in internal SSD being converted to APFS.