I have an install in which there is are steps that are only for some platforms. Is there a way to avoid displaying the step for the platforms that do nothing?
No, it's not possible, the installer steps are global, and their display cannot be prevented for some platforms. But again, as I said, they can be skipped for certain platforms, using platform checks.
If this display problem is such a big issue, maybe some workarounds can be imagined: like having different installers where the single difference is the list of the installer steps, and they both call a merge module that does the actual file installation. The drawback to that is obviously the difficulty in maintaining such a scenario. A second workaround I can think of is the following: you can check (at your own risk) how the list of steps are represented in the .iap_xml file and before building the installer for the platform that steps are not to be present you can patch the file by removing the not needed steps.
