Best to move this to MAC products that is where we put MAC issues.
Best to call support and ask them as we mods are not mac users (well most of us are not)
Actually try this
Could you try disabling TimeMachine while you are downloading and installing LiveSafe. Tech support have seen reported issues with TimeMachine enabled, but when they have downloaded and installed with TimeMachine disabled it seems to work.
Could you attempt installation now and update us?- we had found one issue and rectified on backend for certain type of userbase.