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Archived - Mac OS 9.1: Start Up from CD to Install on Original Power Macintosh Computers

A Mac OS 9.1 CD is required to install Mac OS 9.1 on original Power Macintosh computers.
This article has been archived and is no longer updated by Apple.
A Mac OS 9.1 CD is required to install Mac OS 9.1 on original Power Macintosh computers.

Affected computers

Power Macintosh 6100 series
Power Macintosh 7100 series
Power Macintosh 8100 series
Power Macintosh 8115
Workgroup Server 6150
Workgroup Server 8150
Workgroup Server 9150

After placing the Mac OS 9.1 CD in the drive, restart the computer. Press and hold the "c" key during system startup time. When the computer is started up from CD, you will see a unique CD desktop pattern as confirmation.

The downloadable Mac OS 9.1 update available from Apple Downloads is not compatible with original (NuBus-based) Power Macintosh computers.
Last Modified: Feb 19, 2012
  • Last Modified: Feb 19, 2012
  • Article: TA20330
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