I've been able to download Logic X on an up to date machine & have now been able to install it on 10.7.5, everything seems to be working so far.
So far I have been able to use Logix X on 10.7.5 but haven't yet tested with Virus - thanks for the input
Looking for hearing people's experience / staff's info on how it's running with Mavericks, before I will be updating my OS.