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Question: Error -127 when trying to upgrade System 9.1 to 9.2.1

I am trying to upgrade a Beige G3 Powermac, currently running System 9.1, to System 9.2.1 and then System 9.2.2. I have 96 MB of memory and over 5GB of free disk space. I downloaded the 9.2.1. upgrade from another machine, burned it to a CD, and then doubleclicked the 9.2.1 icon on the CD. I specified a new destination folder on my hard disk; StuffIt began decompressing 9.2.1; and then, when the decompression was finished or nearly finished, the useless error appeared:
The disk "MacOS 9.2.1 Update" cannot be used, because an error of type -127 occurred.
Successive iterations of the same procedure failed. Any suggestions?
This G3, I hope, is more hospitable to old files that I need to restore than a new machine would be.

Beige G3, Mac OS 9.1.x

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Jul 5, 2010 2:38 AM in response to Skepto12 In response to Skepto12

Hi, Skepto12 -

That error is most commonly caused by Stuffit Expander intruding where it should not. The download is in a .smi (self-mounting image) format, a format generated by Apple's Disk Copy. Stuffit Expander has ShrinkWrap technology built-in, which allows it to mount some kinds of disk images - but not .smi ones. Yet ShrinkWrap tries to - hence the error message.

The solution - double-click Stuffit Expander, and open its Preferences (under the File menu). Select "Disk Images" from the list on the left, then turn off (uncheck) "Mount Disk Images". Quit Stuffit Expander.

Jul 5, 2010 2:38 AM

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Question: Error -127 when trying to upgrade System 9.1 to 9.2.1