hello, I just got a old mac run with mac 10.6, I think I only can use mac 5.5 or 6 on it, I just want to try the old aivd mc, does anybody know where I can get the avid mac for mac 10.6? thanks so much.

On the Avid download Centre you can go back as far as MC 5.5.4

More info on the hardware requirements here

https://avid.secure.force.com/pkb/articles/en_US/compatibility/Media-Composer-System-Requirements

But you'll need a dongle to operate it and frankly things have moved on a long way since then.