I'm looking at some app that allow you to remotely login to a Mac from an iPad Pro and am curious to hear from others how useful it really is. 1. How do you use this type of app to remotely login to your Mac? 2. Are you able to remotely login to your Mac over the internet or just while on your network? 3. Are there security issues with doing this? 4. What happens when your Mac goes to sleep? Thanks.