DOS is not part of an Apple computer, it is part of all Windows PCs.
To turn off an Apple computer click on the Apple menu icon (top left corner of screen) and select Shut Down... from the menu.
Apple DOS was created in 1978.
Bill Gates owns DOS, (DISK OPERATING SYSTEM) which is used in most products involving a computer/laptop, Apple products use DOS mainframes but they are edited to fit the Apple product, Windows is technically the founder and owner of DOS as Bill Gates has now signed over his ownership to his children, so he doesnt technically own DOS or Microsoft and Windows anymore. So Bill Gates' children own DOS but i arent sure who made DOS
Apple computers are made by Apple. Apple write their own operating system called Mac OS X to use on their computers. Legally you can only run Mac OS X on a computer made by Apple. Other makes of computer cannot be turned into Apple computers.
IO.SYS FILE http://www.techs-on-call.biz/blog/post.cfm/understanding-how-a-computer-works-part-3-early-apple-computers-and-ms-dos
Sometimes if you turn the clock a day forward on your computer it works but sometimes it dos not
Craig Menefee has written: 'Harnessing DOS 6.0' -- subject(s): MS-DOS (Computer file), PC-DOS (Computer file) 'Byte's DOS programmer's cookbook' -- subject(s): MS-DOS (Computer file), Microcomputers, PC-DOS (Computer file), Programming
Boot file load sequence:IO.SYSMSDOS.SYSCOMMAND.COMIO.SYS FILEhttp://www.techs-on-call.biz/blog/post.cfm/understanding-how-a-computer-works-part-3-early-apple-computers-and-ms-dos
DOS
It can't. DOS does not have access to or support for most of the features on a modern computer.
In 1981, Apple released the Apple II Plus, an enhanced version of the original Apple II. The Apple II Plus featured a more advanced keyboard, improved memory options, and the ability to run the new Apple DOS 3.3. This model solidified Apple's position in the personal computer market and continued the success of the Apple II line.
Try charging or connecting to computer to back it up. If not then contact Apple