A problem exists in the MACE Ethernet controller chip used in the Macintosh products listed above. In some situations the MACE Ethernet controller chip can get into a condition that can cause the operating system to hang, cause data corruption, or cause a system crash. The fundamental cause of the problem is an error condition known as a late collision. A late collision is defined as a collision that occurs after the initial, and normal, 64 byte collision window (preamble and start frame delimiter not included). Late collisions are usually the result of a network whose physical extent exceeds the maximum round trip delay as specified by the 802.3 specification. This can be caused by a network segment that is too long, or from a network design that exceeds the maximum number of allowable repeaters.
Macintosh 840AV, 660AV, and Power Macintosh 6100/60, 7100/66, and 8100/80
systems will typically see this problem manifest itself as a system hang. The
problem usually occurs when transferring data from the Macintosh to a remote
device (File Server, Mail Server, etc.). The Macintosh appears to be frozen,
the mouse can still be moved but no menu items can be selected. In some
situations the Macintosh may not freeze but may corrupt the data in the packet
being transmitted when the late collision occurred. The corrupt data actually
looks like valid data and is accepted by the destination device. As such this
problem can cause corrupt files to be stored on File Servers or other remote
devices. Any of the Power Macintosh Systems running AppleShare 4.0.2 or any of
the Apple Workgroup Server products would usually crash with an unimplemented
instruction error when they encountered this condition.
There is no loss of performance in using these new drivers other than the time
required for the driver to retransmit the packet after the error condition is
encountered. The time required to retransmit the packet is no more than a few
microseconds. The packet is retransmitted at the driver level instead of by a
higher level protocol which allows the data transfer to continue without
degrading the performance of the transfer.
Please do not install these drivers on any Macintosh other than those listed
above. There is no benefit and the installation of the extensions based
drivers has only been tested on the affected system configurations.
Installation Details:
The new Built–In Ethernet drivers are installed as an extension instead of as
an integral piece of the "System" file. To install the extensions based
version of the Built–In Apple Ethernet drivers please follow the instructions
below exactly. Even if you have done a install of NSI 1.4.5 previously, it is
important to follow the steps provided below.
You might be wondering why you have to install NSI 1.4.5, again? For that matter why do would you need to select Twisted–Pair Ethernet when you're using the AAUI interface? The answer is that this is the first time that Apple has distributed a network driver as an extension. As such an obscure problem was discovered that caused the NSI installer to not update a piece of software that is now needed to load drivers from the extension folder. As this code was never required before the release of these new drivers this was never a problem. By following the instructions below you will install an updated piece of code that will allow the extensions based drivers to load. If you do not follow the instructions the extensions based drivers will not load.
You should install NSI 1.5 when it becomes available as it will remove all old Ethernet drivers from the System and install the latest versions of AppleTalk and of the "Apple Built–In Ethernet" driver file. With the release of NSI 1.5 all Ethernet drivers will reside in the "Apple Built–In Ethernet" extensions file instead of in the "System" file.
Installation Instructions:
1. Run the NSI 1.4.5 Installer and choose "Custom" install.
2. Choose "AppleTalk v.58.1.4 for System 7" and "EtherTalk for Ethernet NB
Twisted–Pair Card". Click "Install" to install the drivers. The installer
then forces a restart.
3. Drag the "Apple Built–In Ethernet" file onto the System folder.
4. Reboot the system.
You can verify that the new drivers are loaded by observing the extension icons displayed at boot time. After installing the new driver you should see the Built–In Apple Ethernet" icon (same icon as is associated with the "Apple Built–In Ethernet" drivers file you did the drag install on) when the system is loading.
----------------
Apple Multimedia Tuner 2.01
Update Type: Disk/Complete Files
Release Date: 10/24/94
Needs: QuickTime 2.0, Sound Manager 3.0
––––––––––––––––––––
Subj: Apple MultiMedia Tuner 2.0.1 January 20, 1995
File: Multimedia Tuner 2.0.1.sea (76870 bytes)
DL time (19200 baud): < 1 minute
Download count: 2
AUTHOR: Apple Computer, Inc.
NEEDS: QuickTime 2.0, Sound Manager 3.0
Name: Apple Multimedia Tuner
Version: 2.0.1
Released: 16–Dec–94
Description: See information from the Read Me below.
The enclosed file is a self–extracting archive. To use, download, double–click the downloaded file (this decompresses it).
Apple Multimedia Tuner 2.0.1 replaces Apple Multimedia Tuner 2.0 posted earlier.
Apple Multimedia Tuner 2.0.1 Read Me
Apple strives to provide maximum reliability for its customers. This update provides specific improvements that many Apple Macintosh customers will find helpful.
What is the Apple Multimedia Tuner?
The Apple Multimedia Tuner system extension includes a set of software enhancements that improve the performance and reliability of some software applications and multimedia titles that utilize Apple's QuickTime and Sound Manager software on Macintosh computers running system software versions 6.0.7, 7.0, 7.0.1, 7.1, 7.1.1 (System 7 Pro), 7.1.2 (for Power Macintosh), or 7.5.
What are the enhancements that the Apple Multimedia Tuner 2.0.1 provides?
Prior versions of the Apple Multimedia Tuner may not have been active running pre–System 7.1 versions of the system software. This problem has been fixed in version 2.0.1.
Multimedia data read from ISO 9660–only CD–ROM discs may not have been displayed properly when earlier versions of the Apple Multimedia Tuner were installed. This problem has been fixed in version 2.0.1.
Users of Adobe Premierex and other multimedia authoring software programs will experience improved system reliability under low–memory conditions with version 2.0.1 of the Apple Multimedia Tuner.
The following enhancements were originally incorporated into version 2.0 of the Apple Multimedia Tuner and are also included in version 2.0.1:
QuickTime 2.0 contains enhancements that can dramatically improve QuickTime movie playback performance in software applications and multimedia titles. Some existing software applications and multimedia titles do not properly initiate movie playback and will not be able to realize the performance improvements of QuickTime 2.0. The Apple Multimedia Tuner 2.0.1 helps these applications and multimedia titles achieve much smoother and consistent movie playback.
In some situations, there may not be sufficient RAM available to play sounds. If you are using Sound Manager 3.0, the Apple Multimedia Tuner 2.0.1 will improve the system's ability to play sounds under these conditions.
The Apple Multimedia Tuner 2.0.1 improves the reliability of Quadra 660AV and Quadra 840AV systems running some compute–intensive applications under low–memory conditions.
How do I know if I should use the Apple Multimedia Tuner?
This system extension should be used with QuickTime 2.0 and with the Sound Manager 3.0.
The Apple Multimedia Tuner automatically determines whether your computer can benefit from the enhancements it provides. If so, the Apple Multimedia Tuner initializes itself when your computer starts up, and its icon displays briefly at the bottom of your screen. If not, the Apple Multimedia Tuner has no effect, and its icon is not displayed during start–up.
The enhancements provided by the Apple Multimedia Tuner 2.0.1 will be incorporated into future versions of QuickTime and the Sound Manager.
Installing the Apple Multimedia Tuner:
To install the Apple Multimedia Tuner, simply drag the Apple Multimedia Tuner system extension to the Extensions folder inside your System Folder, under System 7, or to the System Folder, under System 6. You must restart (reboot) your Macintosh to take advantage of this software.
Copyright 1994 Apple Computer, Inc.
Apple, the Apple logo, and Macintosh are trademarks of Apple Computer, Inc., registered in the U.S. and other countries. QuickTime, Power Macintosh, and the System 7 logo are trademarks of Apple Computer, Inc.
----------------
Apple Workgroup Server 95 Tune–Up 2.0
AWS 95 Tune–Up (2.0)
Copyright 1994 Apple Computer, Inc.
The enclosed file is self–extracting archive contining a Disk Copy 1440K disk
image. To use, download, double–click on the file to expand it and use Disk
Copy to create the disk.
Disk Copy can be found in the Utilities folder posted here.
ABOUT THE APPLE WORKGROUP SERVER 95 TUNE–UP
To get the maximum performance and minimize problems with your server, it is
important to install the Apple Workgroup Server 95 Tune–Up. This update tells
you how to install the tune–up software, lists the files affected by the
changes to the server software, describes in more detail the improvements
provided by the tune–up, and lists changes of interest to developers.
TUNE–UP INSTALLATION PROCEDURE
The tune–up Installer automatically installs the software that you need to take
advantage of the enhancements.
The Apple Workgroup Server 95 Tune–Up updates the A/UX operating system from
version 3.1 to 3.1.1. The installation process doesn't affect any of the current kernel parameter settings.
Before You Begin
Before you begin the installation, be sure to back up all files and notify
users that you will be shutting down the server in order to install the tune–up
software. During the installation process, the system quits all programs
running on the server; you must restart the server to complete the
installation.
To perform the installation, you must be logged in to the server as "root". If
your server is set up with the default configuration for file and print
services, and the Autologin feature is enabled, you should be logged in as
"root" automatically when you start the server. If your server is configured as
a database server, you must log in as "root" by means of the Login dialog box.
Installing the Tune–Up Software
Make sure that you are logged in as "root" and then follow these steps:
1. Insert the disk you have just created.
If the CommandShell application is the active application, the system displays
this message: "This is a Macintosh disk. What do you want to use it as?" If
this message appears, click the button labeled "Macintosh."
2. Double–click the Installer icon.
This message appears: "You can only install the AWS 95 Tune–Up on the root
volume, '/.' Please click Switch Disk to choose this disk."
3. Click Switch Disk until '/' is selected.
4. Click the Install button.
5. Click Continue to automatically quit all other running applications.
The tune–up installation begins, and the system displays a progress bar and
status messages during the process.
The kernel is reconfigured; this process may take several minutes. After your
server has loaded all of the appropriate tune–up software, the message
"Installation successful" appears.
6. Click the Restart button to complete the installation.
NOTE: If you routinely back up the server's system files (for example, to
tape), you should make a new backup after performing the installation, as the
system files will have been upgraded.
README
for the APPLE WORKGROUP SERVER 95
TUNE–UP 2.0
This document describes changes made to the latest release of the Apple
Workgroup Server 95 system software, A/UX 3.1. You must be running A/UX 3.1 to
install this software. If you are running an earlier version, call Apple at
1–800–769–2775, Ext. 7822, to order the AWS 95 Software Upgrade. After
installing A/UX 3.1, then you can install this Tune–Up.
NOTES ON INSTALLING THE TUNE–UP
Installation takes approximately 5 minutes. The installer's on–screen messages
will guide you through the installation process. You will be required to
restart your system after the installation has completed, so be sure to prepare
any clients ahead of time for a service interruption.
IMPROVEMENTS
Application support
• Use of Timbuktu Pro's TCP/IP connection method no longer causes the A/UX
Macintosh environment to hang.
• A problem which caused AppleSearch indexing to fail under heavy load has been
corrected.
• Colour Central no longer hangs under heavy load.
• BeHierarchic and NowMenus no longer cause hangs or crashes of the Mac
environment.
AppleTalk
• Routerless nets where the systems have unique network numbers but identical
node numbers will no longer experience dropped packets which lead to major
performance degradation.
• The ADSP stack now correctly completes a read request when no data is
available on a half closed session. Previously, the read request was queued
which could cause applications utilizing ADSP to hang.
A/UX File Manager
• The volume backup time is now correctly maintained for the virtual UNIX
volume, ‘/’.
• The File Manager supports file names beginning with the bullet character,
‘•’. However, these characters were translated into dot, ‘.’, on the UNIX
filesystem to avoid a problem with the Finder interpreting files beginning with
dot as drivers. A new environment variable, TBSEEDOTS, now prevents this
translation. It is NOT set by default.
• Remote NFS filesystems having a space in their name no longer cause the File
Manager to become confused.
• Unrecoverable disk read errors no longer cause the entire Mac environment to
crash.
• Random failures during Finder copies and saving from applications to the
server have been eliminated.
• The performance when extending the resource fork of an AppleSingle file on
the UNIX filesystem has been improved dramatically. Currently if this occurred
during a save of a large file (via an arbitrary application), it could take up
to 3 times longer to save the file than normal. There should now be no
measurable difference between a normal save and one that happens to extend the
resource fork.
• A problem that caused save's from applications to fail with the message,
'File couldn't be saved because it couldn't be found' has been eliminated.
• The creator of the file /etc/fstab has been changed to TextEditor's
signature.
• A 'find' of file or folder names that contain accented vowels (or other
diacriticals) now works properly.
A/UX Kernel
• The A/UX kernel no longer panics if more than four Ethernet interfaces are
installed.
• The console emulator no longer hangs if you stop <CTRL–S> the output.
• A kernel bus error, which could occur under heavy file I/O, has been corrected.
• Certain I/O operations no longer cause the kernel fault handler to panic the
system.
• The FIONREAD ioctl no longer causes the system to hang when issued from a
background process.
• A problem which caused the kernel’s asynchronous I/O data structures to
become corrupted has been fixed.
• NFS now maps client user IDs greater than 65533 to the anonymous user,
"nobody".
UNIX Printing
• Lpr(1) now prints correctly via AppleTalk to the LaserWriter 810.
• The lpr(1) back–end utility for PostScript printing is now enscript(1).
Therefore, lpr(1) now supports eight–bit characters and the Grave character, `,
on all LaserWriters.
UNIX File Locking
• A problem which prevented the lock daemon from detecting contention between a
process running on the server and a process running on the client has been
corrected.
• The lock daemon, rpc.lockd, no longer fails after a connection timeout with
the status monitor on another machine.
• Previously, on a system with NFS configured, some signals were ignored while
a process was waiting on a lock.
• The lock daemon now supports version 3 of the lock protocol for PC–NFS
clients.
Other UNIX Utilities
• The shutdown(1m) command no longer complains about RPC port mapper failures.
• The default rotational delay set by newfs(1m) is now zero microseconds.
• Previously, if you aborted an FTP connection to stop a transfer, the A/UX FTP
server would shut down the control connection and the session would be lost.
• The 'cron' daemon no longer crashes after running 17576 jobs.
• The status daemon, rpc.statd, will now continue to operate when it cannot
re–establish connections with other servers after a crash.
Of Interest to Developers
• The pap_write routine in the PAP server library now functions correctly.
• A process which blocks SIGALRM and then calls the sleep(3) function, no
longer sleeps forever.
• The POSIX library, /lib/libposix.a, now includes versions of the lstat and
fstat system calls which reference the POSIX–compliant stat structure.
• The strftime routine no longer hangs when called.
• For improved security, the gethostbyaddr routine now cross–checks information
in the host databases.
Miscellaneous
• Under A/UX 3.1, if Password Checking is turned on in A/UX Startup, the
MacPartition (boot volume) is hidden from all users, including the super–user.
This has been corrected; the super–user (root) can always see the MacPartition.
• The new 250MB, 500MB, and 2GB SCSI drives are now listed in /etc/disktab.
• The system date spontaneously changing to sometime in 2017 has been
eliminated, along with the problem of Restrospect scripts calculating next
execution times for a date and time in 2017.
• A system crash/hang could occur when using a remote client to open a
FileMaker database that was represented by an 'alias', but that did not exist.
This has been eliminated.
• The 'catsearchd' now uses roughly 15% less memory and finishes the initial
scan at system startup in approximately 20% less time.
FILES CHANGED OR ADDED BY THE UPGRADE
• Files Changed or Added on the / Volume:
etc/catsearchd
etc/config.d/newunix
etc/cron
etc/disktab
etc/fs/ufs/mkfs
etc/fstab
etc/in.rlogind
etc/in.remshd
etc/install.d/boot.d/adsp
etc/install.d/boot.d/elap
etc/install.d/boot.d/nfs
etc/install.d/boot.d/ufs
etc/install.d/boot.d/svfs
etc/macgetty
etc/mount
etc/rpc.lockd
etc/rpc.statd
etc/RELEASE_ID
etc/shutdown
lib/libposix.a
lib/libc.a:gethostent.o
lib/libc.a:tempnam.o
lib/libc.a:tmpnam.o
lib/libc.a:mntent.o
lib/libc.a:strftime.o
lib/libc_s.a:gethostent.o
lib/libc_s.a:tempnam.o
lib/libc_s.a:tmpnam.o
lib/libc_s.a:mntent.o
lib/libc_s.a:strftime.o
mac/lib/Patches/Patch.067C
unix
usr/bin/atprint
usr/bin/enscript
usr/etc/in.ftpd
usr/etc/in.telnetd
usr/lib/libat.a
usr/lib/libpaps.a
usr/lib/ps/enscript
usr/lib/sendmail
usr/spool/lpd/AppleTalk/ifilter
usr/spool/lpd/AppleTalk/nfilter
usr/spool/lpd/AppleTalk/ofilter
-------------
Chinese Language Kit 1.1.1
See Chinese Language Kit Updater 1.0
--------------
Chinese Language Kit Updater 1.0
Update Type: Updater/Patch
Release Date: 11/27/94
Needs: Chinese Language Kit 1.x
––––––––––––––––––––
Enclosure: Chinese Lang. Kit Updater.sea
Chinese Language Kit Updater 1.0
Copyright 1994 Apple Computer, Inc.
Name: Chinese Language Kit Updater
Version: 1.0
Date Released: November 27, 1994
Description: This software updates the Chinese Language Kit to version 1.1.1.
Please refer to the Read Me below.
The enclosed file is a self–extracting archive of a Disk Copy 1440K disk image.
To use, download, double–click the downloaded file (this decompresses it),
and use Disk Copy to create a disk.
Disk Copy can be found in the Utilties folder posted here.
Files found on the Updater disk:
––––––––––––––––––––––––––––––––
Chinese Updater 1.0
Installer 4.0.3
Read Me
Support Files
– InputBackSupport 7.5
– Language Kit Extension 7.5
– SimpleText 1.1.1
– Simplified Chinese CH1–7.1.1
– Simplified Chinese Input Method CH1–1.0.3
– Traditional Chinese TA1–7.1.1
– WorldScript™ II 7.5
– WorldScript™ Power Adapter 7.5.1
From the Read Me:
About the Chinese Language Kit Updater Disk
Installation
If you have installed System 7.5 and the Chinese Language Kit on your computer,
you need to use the Updater program on this disk. Do not use the Updater if you
are not running System 7.5.
IMPORTANT Use the Updater program after you have installed the Chinese Language
Kit software. If you have installed only one version of Chinese (Simplified or
Traditional) and later decide to install the other version, you must use the
Updater program again after installing the other version.
System Requirements
To install the Chinese Language Kit and the software on this Updater disk, you
need the following:
• Macintosh system software version 7.5
• a hard disk with at least 22 megabytes (MB) of disk space available if you
want to install both Simplified and Traditional Chinese and their TrueType
fonts (You need only 8 MB if you are installing only Simplified Chinese and its
TrueType fonts, or 15 MB if you are installing only Traditional Chinese and its
TrueType fonts.)
• at least 16 MB of random–access memory (RAM) if you are using QuickDraw GX
and/or PowerTalk along with the Chinese Language Kit; 8 MB of RAM if you are
not using QuickDraw GX or PowerTalk
====
Provides compatibility with System 7.5.
-------------
Color StyleWriter Pro 1.5.2
Name: Color SW Pro
Version: 1.5.2
Released: 29–Nov–94
Description: Version 1.5.2 fixes two problems found in version 1.5:
Problem #1: Fixes a problem where Power Macintosh systems would freeze when
trying to print to the Color StyleWriter Pro the very first time. The freeze
would typically occur while printing the calibration page.
Problem #2: Fixes a problem, involving certain Macintosh systems with 32MB or
more of RAM installed, where users would get an error type –39 when trying to
print to a Color StyleWriter Pro.
Copyright 1994 Apple Computer, Inc.
The enclosed file is a self–extracting archive. To use, download, double–click
the downloaded file (this decompresses it).
To install, drag the Color SW Pro file to the System Folder. It will be
automatically placed in the Extensions folder.
---------------
Macintosh Easy Open 1.1.1
Update Type: Disk/Complete Files
Release Date: 10/24/94
Needs: —
––––––––––––––––––––
Enclosure: Macintosh Easy Open 1.1.1.sea
Name: Macintosh Easy Open
Version: 1.1.1
Released: 24–Oct–94
Description: Version 1.1.1 fixes a problem found in version 1.1, included with
System 7.5. Some documents could not be "dropped" on top of the Document
Convertor application (i.e. the Document Convertor application would not
"highlight").
Copyright 1994 Apple Computer, Inc.
The enclosed file is a self–extracting archive. To use, download, double–click
the downloaded file (this decompresses it).
To install, drag the Macintosh Easy Open file to the System Folder. It will be
automatically placed in the Control Panels folder.
MacTCP version 2.0.5 was only released internal to Apple.
MacTCP 2.0.6 contains the following improvements over MacTCP 2.0.4 and earlier
versions:
Domain Name Resolver:
–––––––––––––––––––––
• Inbound Domain Name Server replies are now processed one Resource Record (RR
at a time in order to avoid exhausting the DNR's limited pool of memory. This
allows 2.0.6 to swallow the most verbose BIND 4.9.2/3 ADDAUTH PTR replies
without encountering an out–of–memory error condition.
• The DNR now only caches A and CNAME RRs from the Answer section. NS RRs from
Authority and A RRs from Additional are used to recursively follow–up
references if that's necessary, but they are not stored. This greatly reduces
the demand placed on the DNR's limited memory pool. It also transforms the DNR
almost totally into a Stub Resolver (see RFCs 1034 and 1035). As a side effect,
each new query starts off with only the name server information originally
configured in the control panel or from a server. This makes the choice of
which server(s) to contact, and the order in which they will be contacted, much
more determinate and under the control of the configuring administrator.
• Several small memory leaks have been fixed, including a corner case in MacTC
2.0.4 in which a block of memory could be freed twice, causing indeterminate
problems later on.
• The DNR is now fully up to date in terms of permitted and forbidden syntax
for domain names.
• Domain name syntax checking has been extended to cover MXINFO and HINFO
requests; previously only A requests (String To Address) went through this
check.
Performance:
––––––––––––
• Previous versions of MacTCP kept track of retransmission timers on a per
segment basis. If 4 successive segments were dropped due to congestion at a
gateway, the retransmission of each one would require a separate time–out, and
each would force an additional exponential back–off. Because of this,
retransmission time–outs sometimes became excessively long. In MacTCP 2.0.6,
retransmission of a group of segments does not result in further exponential
back–offs.
• Under certain conditions, MacTCP 2.0.6 will assume that a duplicate ack
implies that retransmission of data will be required, and will expedite the
retransmission process. This often results in much shorter retransmission
delays when MacTCP is sending data.
Configuration:
–––––––––––––
• Previous versions of MacTCP checked both the source and destination port
field in Bootp configuration responses, and did not accept the response unless
the source port was 67 (Bootp Server) and the destination port was 68 (Bootp
Client). Because the Bootp protocol permits Bootp Relay Agents (which are
Clients) to relay configuration packets from their own Client port address,
MacTCP failed to accept valid Bootp responses passing through Bootp Relay
Agents that implemented this feature. MacTCP 2.0.6 now only checks the
destination port for validity.
• When configuring via Bootp, previous versions of MacTCP saved only the last
Domain Name Server returned in a Bootp reply. In cases where only one DNS
server was returned, this didn't matter. When more than one server was
returned, the one saved (the last one) was usually the least desirable server.
2.0.6 is still limited by architectural constraints to using a single
Bootp–configured DNS server, but it now saves the first one returned – that is,
the "best" or most desirable server in the list.
• Previous versions contained a bug in the Bootp configuration code for the
processing of the Default Gateway option that could have led the DNR to corrupt
any portions of a Bootp reply following that option.
12/08/94
=======
MacWeek, 1/2/95, p18: Users are complaining that 2.0.6 does not associate numeric TCP/IP addresses with host computer names as flexibly or reliably as its predecessor, Version 2.0.4. Therefore, if users can't access their preferred name servers, they may have to restart their Macs to make the switch.
...
Meanwhile users can retain the extra features by sticking with MacTCP 2.0.4, though they will miss the performance and bug–fix advantages of Version 2.0.6.
---------
Monitor Energy Saver 1.1
Enclosure: Monitor Energy Saver (1.1).sea
Copyright 1994 Apple Computer, Inc.
The enclosed file is a self–extracting archive. To use, download, double–click
the downloaded file (this decompresses the file).
Note: Version 1.1 fixes a problem with the Apple AudioVision 14 Display.
ENERGY SAVER
Apple Computer plans to make energy efficiency a standard feature of all
computers and peripheral devices. We believe that energy efficient products
help customers make a positive environmental contribution and also reduce their
energy costs.
Apple has been a supporter of the Energy Star program from the very beginning
as a charter participant and has already translated its commitment into real
products.
WHAT IS ENERGY SAVER?
Energy Saver is a control panel that gives you the option of setting your
monitor to go into low power mode after your computer has been idle for a
specified time up to one hour. This control panel will function only on
Macintosh Quadra, Centris, LC III and Power Macintosh computers, and requires
System 7.1 or greater.
Energy Saver will function only with Apple Energy Star–compliant monitors using
the built–in video support. To find out if your monitor is Apple Energy Star
compliant, check the label on the box that your monitor came in for the "EPA
Energy Star" logo, or ask your service provider. Monitors that do not support
this energy saver function, or monitors that use video cards will not be harmed
by the installation of this control panel, but they will not save energy with
Energy Saver installed.
WHAT ENERGY SAVER DOES
Energy Saver darkens your monitor while it is inactive and reduces the
monitor's power consumption level.
When your Apple Energy Star–compliant monitor has been inactive (that is, you
have not used the mouse or keyboard) for the time specified in the Energy Saver
control panel, the screen of your monitor will go black. This indicates that
your monitor is in low power mode, and is saving energy. Your computer is
still functioning.
The monitor will return to fully active state approximately 20 seconds after
you use the keyboard or mouse. You will hear a number of beeps while the
screen is updated to reflect its current state. (Note: The beep volume cannot
be adjusted; it is independent of all system sound controls.)
Important: Monitors that are not Apple Energy Star compliant will be unable to
utilize the energy saving features of the Energy Saver control panel. If Energy
Saver is installed on a computer that has a noncompatible monitor, the monitor
will go black after the specified inactivity period has passed, but the
noncompatible monitor will NOT be in low power mode, and therefore will NOT be
