Hi,
I have 8GB on my host Mac.
I have fixed the problem. The solution was strange. I found it here, posted by JEKnight: https://discussions.apple.com/thread/4388799?start=0&tstart=0
Copied and pasted:
1) Turn off Time Machine backups.
2) Open Spotlight Preferences; select the Privacy tag and drag the icon of your hard drive into the box. This tells spotlight NOT to index your hard drive. (temporary setting)
3) If Spotlight already "indexing", do a normal shut down of the Mac and restart.
4) When the computer is back up, use Disk Utility ( in Applications> Utilites) to fix permissions. Not sure this is absolutely necessary, but in case the issue is related to file permissions, it couldn't hurt.
5) Re-open Spotlight preferences, go to Privacy tab, click your hard drive and click '-' (minus) to remove from privacy and restart Spotlight indexing.
6) After the Spotlight index is finshed (mine took well under an hour), then turn Time Machine backups back on. It only took a little while on my Mac for that too.