ð Software Extensibility and the System Object Model (SOM) ð WWDC Release May 1996 © Apple Computer, Inc. 1992–1996 ð Apple Computer, Inc. © 1992–1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, AppleLink, AppleScript, AppleShare, AppleTalk, GeoPort, HyperCard, ImageWriter, LocalTalk, Macintosh, MacTCP, OpenDoc, PowerBook, Power Macintosh, PowerTalk, QuickTime, TrueType, and WorldScript are trademarks of Apple Computer, Inc., registered in the United States and other countries. Balloon Help, Chicago, Finder, Geneva, Mac, and QuickDraw are trademarks of Apple Computer, Inc. IBM is a registered trademark of International Business Machines Corporation. MacPaint and MacWrite are registered trademarks, and Clarisworks is a trademark, of Claris Corporation. NuBus is a trademark of Texas Instruments. PowerPC is a trademark of International Business Machines Corporation, used under license therefrom. UNIX is a registered trademark of Novell, Inc. in the United States and other countries, licensed exclusively through X/Open Company, Ltd. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any …

ð INSIDE MACINTOSH Text Handling and Internationalization ð WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 ð Apple Computer, Inc. © 1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, Macintosh, and WorldScript are trademarks of Apple Computer, Inc., registered in the United States and other countries. Mac and QuickDraw are trademarks of Apple Computer, Inc. Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated or its subsidiaries and may be registered in certain jurisdictions. Helvetica and Palatino are registered trademarks of Linotype-Hell AG and/or its subsidiaries. ITC Zapf Dingbats is a registered trademark of International Typeface Corporation. QuickView™ is licensed from Altura Software, Inc. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may als…

INSIDE MACINTOSH Human Interface Toolbox WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 Apple Computer, Inc. © 1994–1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Apple, the Apple logo, Macintosh, and MPW are trademarks of Apple Computer, Inc., registered in the United States and other countries. Finder, Mac, and QuickDraw are trademarks of Apple Computer, Inc. SOM is a licensed trademark of IBM Corporation. Simultaneously published in the United States and Canada. Draft. „ Apple Computer, Inc. 4/30/96 Contents Chapter 1 Introduction to the Mac OS 8 Toolbox 1-1 Overview of the Mac OS 8 Toolbox 1-6 Apple Events and the Toolbox 1-8 Toolbox Event Routing 1-9 Periodic and Background Processing 1-10 Supporting the Mac OS 8 Event Model 1-10 Human…

K INSIDE MACINTOSH Open Transport K WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 K Apple Computer, Inc. © 1994-1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, and Macintosh are trademarks of Apple Computer, Inc., registered in the United States and other countries. Adobe, Acrobat, Adobe Illustrator, Adobe Photoshop, and PostScript are trademarks of Adobe Systems Incorporated or its subsidiaries and may be registered in certain jurisdictions. Helvetica and Palatino are registered trademarks of Linotype-Hell AG and/or its subsidiaries. ITC Zapf Dingbats is a registered trademark of International Typeface Corporation. QuickView™ is licensed from Altura Software, Inc. CompuServe is a registered service mark of CompuServe, Inc. Docutek is a trademark of Xerox Corporation. FrameMaker is a registered trademark of Frame Technology Corporation. NuBus is a trademark of Texas Instruments. UNIX is a trademark of UNIX System Laboratories, Inc. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is Draft. Confidential.  Apple Computer, Inc. 4/25/96 authorized to make any modification, extension, or addit…

ð INSIDE MACINTOSH File Navigation and Access ð WWDC Release May 1996 © Apple Computer, Inc. 1992 - 1996 ð Apple Computer, Inc. © 1992–1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Apple, the Apple logo, and Macintosh are trademarks of Apple Computer, Inc., registered in the United States and other countries. UNIX is a trademark of UNIX System Laboratories, Inc. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO Draft.  Apple Computer, Inc. 4/30/96 Contents Figures Chapter 1 vii File Navigation and Access Overview 1-1 The Mac OS 8 Files Environment 1-3 The Mac OS 8 File Manager 1-3 Speed 1-4 Reentrancy 1-4 Support for Volume-Format Plug-ins 1-4 Use of Notification Services 1-5 International String Support 1-5 Virtual Memory and Microkerne…

K INSIDE MACINTOSH Microkernel and Core System Services K WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 K Apple Computer, Inc. © 1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, Macintosh, and QuickTime are trademarks of Apple Computer, Inc., registered in the United States and other countries. Mac, NuBus, and QuickDraw are trademarks of Apple Computer, Inc. Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated or its subsidiaries and may be registered in certain jurisdictions. QuickView™ is licensed from Altura Software, Inc. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Draft. Confidential.  Apple Computer, Inc. 4/22/96 Contents Chapter 1 About Mac OS 8 1-1 Mac OS 8 Architecture 1-3 …

K INSIDE MACINTOSH Modular I/O K WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 K Apple Computer, Inc. © 1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, Geoport, QuickTime, and Macintosh are trademarks of Apple Computer, Inc., registered in the United States and other countries. AppleTalk and Mac are trademarks of Apple Computer, Inc. Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated or its subsidiaries and may be registered in certain jurisdictions. Helvetica and Palatino are registered trademarks of Linotype-Hell AG and/or its subsidiaries. ITC Zapf Dingbats is a registered trademark of International Typeface Corporation. NuBus is a trademark of Texas Instruments. PowerPC is a trademark of International Business Machines Corporation, used under license therefrom. QuickView™ is licensed from Altura Software, Inc. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or Draft.  Apple Computer, Inc. 4/22/96 liability…

How to Install Mac OS 8 (D11E4): Last revision 6/13/96 Please read these instructions carefully before installing Mac OS 8. Warning: This is a Pre-Release operating system. BACK UP all information on all drives connected to a machine on which you plan to run Mac OS 8. You may experience disk corruption and data loss on this release. You currently need two machines to boot Mac OS 8: one is a machine from the "Hardware Supported" list below, the other is a machine capable of running the Power Macintosh Debugger. The two machines must be connected via a serial cable. See "Debugger Instructions" below. Note: Before installation, place a text file called "No Mac OS 8 Mount" on any drives that you don't want to have mounted while in Mac OS 8. Late-Breaking News: ------------------DO NOT click the "Setup" button when creating a destkop printer. Here are the steps to create a desktop printer in D11E4: 0) Before installing, remove any existing desktop printers 1) Click on the LaserWriter GX icon ==>You'll see a few benign asserts 2) Click on the printer of your choice 3) Click the "Create" button 4) When the "Setup" dialog comes up, hit CANCEL (this is the most important step). 5) You'll have to reboot for a desktop printer to show up correctly 6) Go print! See the Printing release notes for more information. Installation Instructions: -------------------------1) Initialize a 250MB or larger drive using Drive Setup (see "Drive Setup Instructions" below), or another utility. We'll call this freshly initialized drive the "Mac OS 8 volume" 2) Install (do not copy) a fresh System 7.5.x onto the Mac OS 8 volume 3) Run the Mac OS 8 Installer script "Install Mac OS"; install onto the Mac OS 8 volume 4) Set your startup disk to be the Mac OS 8 volume 5) Put down the Caps Lock key 6) Restart ==> You should boot into Mac OS 8 Drive Setup Instructions: ------------------------You should be able to install Mac OS 8 on a drive initialized by any software. We recommend using Drive Setup 2.0d5c2 which is incluced with the D11E4 build. 1) In the Drive Setup window, select your Mac OS 8 volume. 2) Click Initialize. You get the Initialize dialog: "Initializing will destoy all data...". 3) Click Custom Setup...in the Initialize dialog. 4) Select a Partitioning Scheme of 1 Macintosh HFS. 5) Click OK to go back to the Initialize dialog. In the lower status field, it should say: "New Partitioning: 1 Macintosh HFS Initialization Options: none" 6) Click Initialize. Debugger Instructions: ---------------------To run Mac OS 8, you will need a debugging machine. This can be any Macintosh capable of running the Power Mac debugger connected to the Mac OS 8 machine via a serial cable. It does not have to be a PowerPC machine, any Macintosh with 7MB free RAM (Virtual Memory is OK) is sufficient. There is currently no reliable way to run Mac OS 8 without the debugger at this time; however, you should be able to boot to Finder in most cases without a debugging machine connected. Th…

ð INSIDE MACINTOSH Apple Events in Mac OS 8 ð WWDC Release May 1996 © Apple Computer, Inc. 1994 - 1996 ð Apple Computer, Inc. © 1994–1996 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT OR INACCURACY IN THIS MANUAL, even if advised of the possibility of such damages. THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR WRITTEN, EXPRESS OR IMPLIED. No Apple dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Apple, the Apple logo, and Macintosh are trademarks of Apple Computer, Inc., registered in the United States and other countries. Finder and Mac are trademarks of Apple Computer, Inc. Simultaneously published in the United States and Canada. Draft. Confidential.  Apple Computer, Inc. 4/22/96 Contents Chapter 1 Introduction to the Mac OS 8 Event Model 1-1 Apple Events in Mac OS 8 1-4 Apple Event Communications Model 1-4 Apple Event Data Model 1-5 The Mac OS 8 Event Model 1-6 Apple Event Dispatchers 1-8 Handler Tables 1-9 Apple Event Handlers 1-10 Tasking Models 1-11 One Ta…