The information in this article applies to:
- Apple Macintosh System Software, version 7.5.3
SUMMARY
This article lists the enhancements that are included as part
of the System 7.5.3 Revision 2. This list was taken from the
"About System 7.5.3 Revision 2" file that came on the first of
two upgrade disks.
MORE INFORMATION
Who should install System 7.5.3 Revision 2?
Apple is recommending that only customers with specific system software and
Macintosh computers update their systems with System 7.5.3 Revision 2.
There is no benefit for other customers.
The only systems which will benefit from System 7.5.3 Revision
2 are as follows:
- All PowerBook systems using Connectix RAM DoublerŠ
- All PowerBook 5300 and PowerBook Duo 2300 systems
- All PowerBook 200 or 500 Series systems which have been
upgraded with the Macintosh PowerBook Processor Card
Upgrade Kit with PowerPC (or upgraded with similar third
party products).
- All Macintosh 7200, 7500, 7600, 8500, and 9500 systems
You should install System 7.5.3 Revision 2 only if you have a
computer with System 7.5.3 installed or a PowerBook with
System 7.5.2, PowerBook Enabler 1.2 or later installed. To
find out what system software version your computer is using,
follow these steps:
- Make sure you are in the Finder.
- Choose About This Macintosh from the Apple menu.
NOTE:The system software information is in the About
This Macintosh window.
What is System 7.5.3 Revision 2?
System 7.5.3 Revision 2 is a set of system software
enhancements that improves the reliability and performance for
the computers described above.
When you install System 7.5.3 Revision 2, you get the
following enhancements:
- Better reliability for PowerBooks using RAM Doubler If you have a
PowerBook using system software 7.5.3, and use RAM Doubler (version
1.6.1 or earlier), you may have experienced a problem when waking
your PowerBook from sleep. This software fixes this problem.
- Overall performance enhancements for PowerBook 2300 computers and
PowerBook 500 or Duo series computers with the PowerPC Upgrade Card
installed.
- Improved reliability when using PC-formatted floppy disks with
PowerBook 500 series or Duo series computers with the PowerPC Upgrade
Card installed.
If you have a PowerBook 500 series or Duo series computer with
the PowerPC Upgrade Card installed, PC-formatted floppy disks
that were formatted on your computer may be unreadable on MS-DOS
or Windows computers. This software fixes this problem.
- Improved reliability on PCI-based computers (Macintosh 7200, 7500, 7600,
8500, and 9500 computers) and PowerBook 5300 computers, PowerBook 2300
computers, and PowerBook 500 or Duo series computers with the PowerPC
Upgrade Card installed.
- Improved reliability when copying files to a 1 gigabyte hard disk.
If you have a PCI-based computer with a 1 gigabyte drive, this
software helps avoid problems when copying files to the hard
disk.
- Improved reliability when using the Startup Disk control panel.
In rare instances, when you turn on a PCI-based Power
Macintosh computer it may not start up from the disk selected
in the Startup Disk control panel. This software fixes this
problem.
Before you Install note that if you have an AppleVision
monitor, you should install "AppleVision for System 7.5 Update
2.0 fix version 1.0" before you install this update.
When you install this software, an extension called Startup
Tuner is installed in your Extensions folder. This extension
ensures that your computer will correctly start up from the
disk selected in the Startup Disk control panel.
It is recommended that you run the Disk First Aid application
found on the "Disk Tools" disk that shipped with your
computer. Double-click the Disk First Aid icon and follow the
instructions on the screen. Disk First Aid checks your hard
disk for problems. If you have a problem using Disk First
Aid, see the manual that came with your computer.
The products included here are manufactured by vendors
independent of Microsoft; we make no warranty, implied or
otherwise, regarding these products' performance or
reliability.