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Clone VirtualBox .vdi image file on Mac

// Default place of VirtualBox .vdi hard disks
cd ~/Library/VirtualBox/HardDisks/

vboxmanage clonevdi OriginalVDIName.vdi CloneVDIName.vdi

// Now you can use the CloneVDIName.vdi to setup a new virtual machine (in Linux, Mac, Windows)

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