Tried relentlessly to pinpoint the Safari issue. Im my case, it wasn't RAM, it wasn't CPU, but actually Safari claiming all unused HD space. Trust me, I still don't understand. Long story short, I eventually tried this command in terminal: Code: mv /Users/username/Library/Caches/com.apple.Safari /Users/username/Library/Caches/com.apple.SafariOLD Somehow, someway, I've been stable since. Can anyone confirm? PS, first post here. Hi all.