Macintosh Performa 6400: MegaDial Manual Won‘t Open (1/97)

I am attempting to open the MegaDial Manual that was included with my Macintosh Performa 6400 series computer. However, each time I do so, an error message appears stating: "This application has been damaged and should be replaced with a fresh copy from your locked master disk." The only options in this error dialog are Continue or Quit. If I click Continue, a Type 15 error occurs. I tried replacing the copy on the hard disk with the one on the Performa CD, but the error still occurs. How can I resolve this?


The MegaDial Manual is corrupted, so a new version of the file is required. Apple has released an updated version of the MegaDial manual which is available for download from Apple's software update locations.

These articles can help you locate the software update mentioned here:

* "Where To Find Apple Software Updates" - Lists online services for free Apple software updates.

* "Obtaining Apple Product Support in the USA" - Lists 800 numbers and online services for software updates, Apple support information, and a subset of the Apple Tech Info Library.

Article Change History:
31 Jan 1997 - Added information on where to find the manual.
Published Date: Feb 18, 2012