2.70 won't open on mac

So for some reason my mac refuses to open blender 2.70. I realize that this is an old version, but I’m trying to create custom meshes for the sims 4 and apparently certain steps require 2.70. I’ve been able to open all of the newer versions just fine, but 2.70 “quits unexpectedly” as soon as I try to launch it. It tells me that it’s from an unidentified developer, and I’ve adjusted it in my settings to allow them anyway, but it still crashes within a second of me opening it. I have Mac OS X Sierra. If it helps, I can paste in the error message that I get from apple when it crashes.

Open Finder / Preferences and under Sidebar, if you have show ‘iCloud Drive’, turn it off

That worked!! Thanks!