Cannot download any files from Unifier with Safari on Mac even though OK with Firefox.

Hello Unifier MOSC.

I use Unifier 10.0 from my Mac with Safari. In Document Manager menu in Unifier, we have functions to download files from Unifier repository by 1) selecting desired file(s) and 2)click Download button at top.

This function works with Firefox browser fine, but doesn't work with Safari. I use Mac OS X - Marverics (10.9).

I doubt this is caused by authorization mechanism of Safari. As I can download files with Firefox, so I think security setting of Mac OS is not where I should modify. I wonder it might be Safari setting to be modified but  I don't know how and where.