Apple Macintosh System 7.5 - Manual (Page 11)

Step 2: Check your computer’s built-in memory
System software version 7.5 requires that your Macintosh have at least
4 MB (4,096K) of built-in memory. If your computer has more memory,
you can install QuickDraw GX and PowerTalk.
To find out how much memory your computer has, follow the instructions
below.
1 Open the Apple (
K
) menu and choose About This Macintosh.
2 Look at the number next to “Total Memory."
3 To decide what to install, follow the guidelines in the table below.
If memory equals You can install
At least 8,192K (16,384K on a Power Macintosh) System 7.5 with QuickDraw GX and PowerTalk
4,096K (8,192K on a Power Macintosh) System 7.5 only (You can install QuickDraw GX
and PowerTalk only after purchasing more
memory.)
Step 3: When you are ready to install
To ensure a smooth upgrade to the new system software, it’s important that
you check your hard drive for problems and update the driver.
1 Shut down your computer.
2 Insert the Disk Tools disk into the floppy disk drive.
If you’re installing software from a CD: Insert the Disk Tools disk that came
with your CD.
If you’re installing software over a network: Make a Disk Tools disk from the
disk image on your file server. If you need more information, ask your
network administrator.
5 Before You Install System 7.5