I am currently unable to install neither Unity 3.4.2 nor 3.5 beta on Mac OSX Snow Leopard. Both installations hang during the "verifying packages" stage.
I successfully installed 3.5 last week, but wanted to revert back to 3.4.2. When I tried re-installing 3.4.2 the problems started.
I have repeatedly re-downloaded the installation packages, but no joy.
Would be grateful for any ideas ...