Mac OS is a series of graphical operating systems developed by Apple for their Macintosh computers. The first Mac OS was introduced in 1984 with the original Macintosh PC. Over time, Apple developed newer versions that introduced significant new features and graphical overhauls, including Mac OS X in 2001 which transitioned to a UNIX-based system. The latest version is OS X Yosemite which was released in 2014 and brought design inspiration from iOS 7 while maintaining the OS X interface.

1. Mac OS|iOS
APPLE INC

2. Mac OS
 Mac OS is a series of graphical user interface-
based operating systems developed by Apple
Inc. for their Macintosh line of computer
systems.
 Mac OS was designed only to run on Apple
Computers.

3. Mac OS
 In 1984, Apple introduced the Macintosh PC
with the Macintosh Operating System.
 Apple names its OS as “Mac OS”, beginning in
1997 which was previously known as “System”.

4. Advantages of Mac OS
 Easy to Use
 Reliability
 Design
 Integration With Apple and Other Products
 Mac OS can run Windows at the same time

5. Disadvantages of Mac OS
Gaming
Price
Fewer Software Options
 Cannot be upgraded/customized

6. The First Mac OS

7.  1984 | System 0.85
 1984 | System 1.0
 1985 | System 2.0
 1986 | System 3.0
 1987 | System 4.0
 1987 | System 4.1
 1988 | System 6
 1990 | System 7
 1994 | System 7.5
 1997 | Mac OS 7.6
 1997 | Mac OS 8.0
 1998 | Mac OS 8.1
 1998 | Mac OS 8.5.1
 1999 | Mac OS 8.6
 1999 | Mac OS 9
 2001 | Mac OS 9.1
 1999 | Mac OS X Server
 1999 | Mac OS X Server 1.0
 2000 | Mac OS X Server 1.2.3
Earlier Versions

8. Various Versions of Mac OS X
Version Codename Release date
Mac OS X 10.0 Cheetah March 24, 2001
Mac OS X 10.1 Puma September 25, 2001
Mac OS X 10.2 Jaguar August 24, 2002
Mac OS X 10.3 Panther October 24, 2003
Mac OS X 10.4 Tiger April 29, 2005
Mac OS X 10.5 Leopard October 26, 2007
Mac OS X 10.6 Snow Leopard August 28, 2009
Mac OS X 10.7 Lion July 20, 2011
Mac OS X 10.8 Mountain Lion July 25, 2012
Mac OS X 10.9 Mavericks October 22, 2013
Mac OS X 10.10 Yosemite Coming this Fall

9. Mac OS X Cheetah
• Mac OS X version 10.0, code
named Cheetah, is the first
major release of Mac OS X,
Apple’s desktop and server
operating system.
• Mac OS X v10.0 was released
on March 24, 2001 for a price
of US$129. It was the successor
of the Mac OS X Public Beta
and the predecessor of Mac
OS X v10.1.

10. Mac OS X Cheetah
 Mac OS X v10.0 was a big departure
from the previous classic Macintosh
operating system (Mac OS)
 It was Apple’s long awaited answer
to the call for a next generation
Macintosh operating system.
 It introduced a brand new code base
completely separate from Mac OS
9's, as well as all previous Apple
operating systems

11. Mac OS X Panther
 Mac OS X Panther (version
10.3) is the fourth major
release of Mac OS X, Apple’s
desktop and server operating
system.
 Apple advertised that Mac OS
X Panther had over 150 new
features.

12. Mac OS X Tiger
 Mac OS X v10.4 Tiger is the fifth
major release of Mac OS X, Apple's
desktop and server operating system
for Mac computers.
 Tiger shocked executives at Microsoft
by offering a number of features,
such as fast file searching and
improved graphics processing, a
complete built-in dictionary.

13. Mac OS X Leopard
 Mac OS X Leopard (version
10.5) is the sixth major
release of Mac OS X, Apple's
desktop and server operating
system for Macintosh
computers
 Apple advertised that Mac
OS X Leopard has 300+ new
features, including iChat,
Dashboard enhancements,
Dictionary could now search
wikipedia etc.

14. Mac OS X Snow Leopard
 Mac OS X Snow Leopard
(version 10.6) is the seventh
major release of Mac OS X.
 Snow Leopard included
many refinements to the
User Interface and New
wallpapers.

15. OS X Yosemite
 OS X Yosemite is the upcoming
eleventh major release of OS X, Apple
Inc.'s desktop and server operating
system for Macintosh computers.
 Yosemite introduced a major revision
to the operating system's user
interface, designed with inspiration
from iOS 7, while still maintaining the
OS X look and feel.

16. THANK YOU AND GOD BLESS!
References :
http://www.operating-system.org/betriebssystem/_english/bs-macos.htm
http://applemuseum.bott.org/sections/os.html
https://en.wikipedia.org/wiki/Mac_OS
https://en.wikipedia.org/wiki/IOS
https://en.wikipedia.org/wiki/IOS_version_history