Plant fibers usually consist of structural carbohydrates such as cellulose in cell walls. Composed of repeating glucose units in long, single strands, cellulose cannot be digested by enzymes in the human intestine. Other plant fiber components include hemicellulose and pectin.
Mac System Software. Mac OS was named by the company Apple as Mac System Software in the beginning, a specially designed operating system only for 68K first Motorola processors. With own Macintosh hardware, Mac OS takes up a special role in the world of desktop systems. The first version was System 1 and appeared bundled with the Mac in 1984.
March 31, 2015. 1  Locate the operating system on your Mac computer using the Apple menu. The Apple menu is found in the top corner of your Mac's screen. 2  Click the Apple logo in the top-left corner of your screen to open the Apple menu. 3  Select About This Mac on the Apple menu to load the About This Mac dialog.