I read the posts on Mac Air not responding well and think that ESET may have done a fix so that doesn't happen. I've been attempting to install the free trial version but it refuses to install correctly. After rebooting nothing happens and nothing happens when the icon in Applications is either single or double clicked. The post restart installer doesn't start. I've downloaded it twice. At least the machine doesn't slow down or freeze. NQRFPT. To add to the insult ESET doesn't have an email address for problems of this kind. Lion and Mac Air 1.8 GHz Intel Core I7 4 GB RAM.