XojoPluginConverter 1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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 software relates to Developer Tools. This free software for Mac OS X was originally produced by PatiSoftware.
From the developer:
XojoPluginConverter is an application that helps RealStudio and Xojo plugin developers to package their products for Xojo/Real Studio in one of the two accepted formats: RBX (Virtual Volume based) or xojo_plugin (zipped compressed). The application allows you to create the required plugin folder hierarchy, modify its contents or populate it with libraries and resources and, finally, pack up all the stuff together in a plugin file.
You may want to check out more Mac applications, such as AcidSearch Installer, Browsealoud or RAGE WebDesign, which might be similar to XojoPluginConverter.