Hi! there doesn't seem to be a
Sandboxie! alternative for Mac OS, but i was thinking why u need to be concerned as most of the malwares are designed and targeted for Win OSes, the chances of getting infected is fairly remote!
You have
GUI to the inherent Sandbox feature of MAC available.But
No Sandboxie sort of application yet available for mac! Sandboxie for Win has
Email protection capabilities!
The straight forward way to use Sandboxie would be to have a Virtual Machine deployed! using any of the tools like
VMware Fusion or
Parallels.
If you really want to run something in sandbox mode under OS X (leopard), just enable Guest Login (not sharing, just login at the login window as guest).
It is a one time account, has limited privileges (by default OS X users are Admin users, and can modify the applications folder and library folder without being prompted for a password, but they cannot make sweeping systems changes) and when you log out all modifications done in it are deleted.
Again, the first user still has admin privileges, if you want, create a second user without admin privileges, and then you can ONLY do system modifications by typing in the username and password of the first account.Hope this helps,
Sujith