Mac Os X

Only available on StudyMode
  • Topic: Operating system, Virtual memory, Mac OS X
  • Pages : 15 (5230 words )
  • Download(s) : 67
  • Published : August 18, 2012
Open Document
Text Preview
Apple’s Macintosh OSX Panther

CS555 Section 3
Tomomi Kotera

Table of Contents

Table of Contents ………………………………………………………. Page 1

Introduction …………………………………………………………….. Page 2

Overview …………………………………………………………………Page 2

CPU Scheduling ……….…………………………………………………Page 3

Symmetric Multiprocessing (SMP) …..…………………………………Page 5

Memory Protection ………..……………………………….………....…Page 6

Virtual Memory …………..……………………………….…..…………Page 7

Technical and Commercial Success of Mac OS X ….…….……………Page 11

Conclusion ….…………………………………………….….……………Page 13

Bibliography…………………………………………………………….. Page 14

Introduction

The Mac OS X Panther operation system has met with both technical and commercial success. Since the debut of Mac OS X in 2001, its features have continued to improve. The initial system Mac OS X 10.1 was originally shipped in September 2001 and was referred to as Puma; Jaguar, version 10.2, was shipped in August 2002, and Panther, the current version, was shipped in October 2003. The focus of this paper is on the key technologies that have made Mac OS X Panther a technical success such as CPU scheduling, symmetric multiprocessing, memory protection, and virtual memory; we begin with an overview of the MAC OS X operating system.

Overview of Mac OS X Panther

Mac OS, from Apple Computer, can be considered two families of operating systems: the older and now unsupported "classic" Mac OS (the system that shipped with the first Mac in 1984 and its descendants, culminating with Mac OS 9), and the newer Mac OS X. Mac OS X Panther is a UNIX-based Operating System with the intuitive user interface called Aqua. The modern core UNIX-based Operating System brings benefits such as protected memory and preemptive multitasking to Macintosh computing. Mac OS X Panther also has a sparkling user interface capable of visual effects such as translucence and drop shadows. The central characteristic of the Mac OS X architecture is the layering of system software, with one layer having dependencies on, and interfaces with, the layer beneath it (see Figure 1-1). Mac OS X has four distinct layers of system software (in order of dependency): Application Environments consists of the frameworks, libraries, and services necessary for the runtime execution of programs developed with those API. Mac OS X currently provides five application (or execution) environments: Carbon, Cocoa, Java, Classic, and BSD Commands. Application Services incorporates the system services available to all application environments that have some impact on the graphical user interface. It includes Quartz, QuickDraw, and OpenGL as well as essential system managers. Core Services incorporates those system services that have no effect on the graphical user interface. It includes Core Foundation, Open Transport, and certain core portions of Carbon. Kernel Environment provides the foundation layer of Mac OS X. Its primary components are Mach 3.0 and FreeBSD, but it also includes networking protocol stacks and services, file systems, and device drivers. The kernel environment offers facilities for developing device drivers (the I/O Kit) and loadable kernel extensions, including Network Kernel Extensions (NKEs). This integrated kernel environment is called Darwin and it is an Open Source technology available from www.apple.com/darwin. The following is the components that Mach 3.0 and FreeBSD provide: Mach

• support for SMP
• untyped IPC and RPC
• memory management
• support for real-time services
• external pager
• modular architecture
• improved performance
BSD
• file systems
• networking
• basic security policies such as user IDs and permissions • the system framework a mechanism for exporting APIs to the application layers • the BSD process model, including process IDs and signals • FreeBSD kernel APIs

• Pthreads (POSIX...
tracking img