Cant install asset server in Yosemite

I have mac os x yosemite i download the asset server but i can’t install it, i changed the permission of the /Library/UnityServer i saw also a way if i comment out an “if” but my problem is that i can’t install it, i download the file i click to install and i receive “installation failed”

any ideas how to fix it?

Hey I know it’s not really a solution but I ended up just reinstalling Mavericks and it worked fine.