What utility or tool that runs which under Mac OS X 10.6 can I use to extract data (icon images and strings, etc.) from old Mac OS 7 (and earlier) resource files/resource forks? (...files created using ResEdit.)

3 Answers 3


Rezycle might work for you. Let us know.

  • No longer supported by current macOS.I'd pay you for this still if it got recompiled for the newest macOS. Feb 14, 2022 at 4:46

On OSX you can access the raw resource fork of a file like this:

cp resource_file/..namedfork/rsrc  resource_fork

There's also the system utilities DeRez/Rez (available in OSX 10.7 and as mention by @marc as part of Xcode tools on newer MacOS versions) which allows for extraction of resource fork data into a form for use by the Rez resource compiler - e.g. extract icon data from an Icon file:

DeRez -only icns Icon^M > icon

It should be noted that the resulting files from both of the above commands require additional processing to convert the resources to a suitable form.

See related question on Icon files.

  • 1
    DeRez and Rez were deprecated with Xcode 6 (which deprecated all Carbon tools). However, DeRez and Rez are still available on macOS Monterey with Xcode 13.4 tools. DeRez extracts an icns resource in text form. Including the "additional processing" steps in the shown icns example would be helpful. Jun 21, 2022 at 21:07

Abet slightly unstable, the resource editor Rezilla runs under 10.7.4.

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