What is sleep mode?

I currently do not own a MacPro laptop but plan on getting one. My previous IBM ThinkPad was used alot. I would use it and shut it down when I was finished. I never put it to sleep. Why would I want to? What is the advantage of sleep mode? Wouldn't that just drain your battery? Please explain?

Michael Malek wrote:
I currently do not own a MacPro laptop but plan on getting one. My previous IBM ThinkPad was used alot. I would use it and shut it down when I was finished. I never put it to sleep. Why would I want to? What is the advantage of sleep mode? Wouldn't that just drain your battery? Please explain?
If you ever used the Standby or HIbernate modes on WIndows on your ThinkPad (I used to own one too), the Sleep feature in OS X is like the best of both worlds. Sleep is an instant off/on mode that takes a lot less time than a complete shutdown and startup. Sleep also has the advantage that you don't have to close down all your open documents in all your open apps. In this way it is like Standby and Hibernate.
The important differences are, Mac Sleep uses a lot less power than Windows Standby, and starts up a lot faster than Windows Hibernate, while also having the ability to safeguard the contents of RAM by writing it to disk until you wake the Mac again. Sleep uses little power because all systems are shut down almost all the way. If you have a new battery and you put a Mac to sleep without plugging it in, it can last for several days before the battery runs out.
The best advantage of sleep is instant on, with all the work you were in the middle of when you put it to sleep. No waiting to get the whole machine going again.

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