Old compressed archived files

I have these compressed archived files downloaded in 2001 on OS 9 and now I can't access them on OS X. The extensions of these files get changed to .img and I can't even see exactly what format they were in originally. When I double click on them I get a warning that says 'The following disk images couldn't be opened. Reason: not recognized'
Is there anyway for me to see them in the original extension? Thanks!

X423424X wrote:
When I double click on them I get a warning that says 'The following disk images couldn't be opened. Reason: not recognized'
You should be able to open .img files. At least I can on my 10.6.5 system.
Just to prove it I mounted my old backup of OS9 which had a bunch of .img files. I chose some at random and had no problem expaning and mounting them exactly like .dmg's. The app to open these files are, like .dmg's, DiskImageMounter in /Library/Coreservices. So is that what you have as the default app for opening .img files? If not do a Finder get info on one of the .dmg's and chane (all) that file to Open with DiskImageMounter in /Library/CoreServices.
Some of them I can but very few.. DiskImageMounter is the default app when I tried to open them yes. Thanks!

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jaimiem wrote:
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