I've been reading around to understand abut Mac's security. 1) Is it true that only threats to Mac are things user installs? 2) I can browse, view sites, save images and some webm/mp4 files, but as long as I refuse all weird pop ups asking for my password, I'm safe? 3) I don't go to porn sites. I use Youtube, watch some clips and save images in Tumblr, save pictures and some webm/mp4 files from sites like Deviantart, Danbooru, Gelbooru, some other booru type sites. I use Wikipedia (and have amassed nice cat pic collection by saving photos from there!) I sometimes read news using Mail.com I don't use torrents. I install updates. How safe am I?