Before you install Macintosh system software version 7.5, read the important information below.
Disk First Aid and HD SC Setup
To ensure a smooth upgrade to system software version 7.5, make sure you use Disk First Aid to verify the hard disk and HD SC Setup to update the hard disk before installing the system software. For instructions, see Chapter 1 ("Before You Install System 7.5") in the Macintosh System 7.5 Upgrade Guide.
IMPORTANT If you are installing software on a PowerBook 150, Macintosh Quadra 630, or Macintosh LC 630, you should just run Disk First Aid to verify the hard disk. You do not need to update your hard disk.
RAM Disk
If you use a RAM disk, turn it off before you install system software version 7.5. When the RAM disk is active during software installation, it uses too much memory and prevents your system from starting up.
Quit All Applications
Before you begin installing system software, quit all applications.
Start Up from Install Disk 1
After you run Disk First Aid, HD SC Setup and Safe Install, you can restart your computer and insert the Install Disk 1 disk to install system software. Although starting up from the Install Disk 1 disk is not required, it uses less memory than starting up with your hard disk.
Installation Disks
If you are installing from floppy disks, make sure the installation disks are locked. For more information on locking disks, see the manual that came with your computer.
Installation Time
Depending on your model of Macintosh, installation may take fifteen minutes to about an hour.
PowerBook 150 with Internal Modem
There is a compatibility problem with the PowerBook 150 with an internal modem and some communication software programs. We have included a fix for this problem on the Before You Install disk. After you install System 7.5 on a PowerBook 150 with an internal modem, insert the Before You Install disk, drag PB 150 Modem Patch to the System Folder icon, and then restart your computer.
Server or Network Programs
Anytime you upgrade or re-install your Macintosh system software, you should also re-install your server or network programs, such as AppleShare or Apple Remote Access. For instructions, see the information that came with your server or network software.
IMPORTANT If you have Workgroup Server 95, do not upgrade to system software version 7.5. Workgroup Server 95 works only with system software version 7.0.1 and System Update 3.0.
Possible Startup Problem on Quadra 900 & 950
After you install System 7.5 on a Macintosh Quadra 900 or 950, it is possible that you may encounter a problem starting up your computer. If you have trouble starting up your computer, do these steps to solve the problem:
1. Restart your computer while holding down the Shift key (to start up without extensions).
2. When the computer is ready, open your Extensions folder (inside the System Folder) and drag SCSI Manager 4.3 out of the Extensions folder.
3. Restart your computer again.
4. After you've started up successfully, if you need the functionality that SCSI Manager 4.3 provides move SCSI Manager 4.3 back to your Extension folder and restart. Your computer should behave normally.
Apple, the Apple logo, AppleShare, Macintosh, Macintosh Quadra, and PowerBook are trademarks of Apple Computer, Inc., registered in the U.S. and other countries. Centris is a trademark of Apple Computer, Inc.
