The 28.0 version of OCDisasm for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Developer Tools, more precisely IDE.
The unique identifier for this application's bundle is x.y.z.OCDisasm. The most popular version of OCDisasm for Mac is 28.0. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free Mac application is Jonathan Paisley.
From the developer:
OCDisasm is a free and interactive Objective C disassembler for Mac users. It has been very useful in the development of the Mail Act-On and Mail Tags plug-ins for Mac OS X Mail app. Control and data flow are computed and on each disassembled line it’s possible to view the current values of registers, provided they can be statically determined.
You may want to check out more Mac applications, such as PowerGlot, ChIDE or EcoLab, which might be related to OCDisasm.