Hello.
I have a Mac OSX 10.6.8 and when I use CCleaner Erase freespace 1.01.106 and have a spinning wheel (for 2 hours) with this message:
Started erase on disk0s2 Macintosh HD
Creating temporary file
Securely erasing file
Then later I got an error message on my Mac that the startup drive was now full ( I have 400GB available) !!
Thanks