Is it bad to stop the Mountain Lion installer halfway through an install? I already have Mountain Lion.  I started installing it again (it warns you that you already have it).  I realized I don't need to install it again.  The install is halfway finished.  Can I just quit the install, or is it actively overwriting files?
Hmm it appears from a screenshot I received Mountain Lion was only downloading and not actually installing:



The solution is to:


Check for unfinished downloads
It will reload everything telling you it's all installed already
The download will reset


Done!