How to move Virtualbox VM

Recently,i encountered a critical virtualbox issue on my windows working machine.    No matter what version I used, it always crash to launch it.

To continue works with my VM, I had decided to move those VMs to my MacBook Pro.  I found all virtualbox VM were located on %USERS%/.virtualbox_VMS/….

Therefore, I copied them to the external usb disk.    After that, I move usb disk to my Laptop.   Unfortunately, it failed to launch.  After I open the file .vobx with 

text editor, it was a pure xml.  I found the hard disk  location in this file was a absolute path.   After I corrected it, and open this .vbox file, everything works fine.