All c++ based plugins have an *.xlib file, which is the compiled plugin, and what does the work.

Running any plugin with an xlib , on MacOS Catalina(or later), will give you a warning, the first time it runs.

Welcome to MACOS...

  • Firstly, when you download a zip file which contains a plugin, do not let Safari unpack it for you. Otherwise it will get quarantined( and you will think it is an empty package)
  • Secondly, once you have simply downloaded the zip(really downloaded it, as is), do not use the system unpacker. Use pretty much any third party unpacker, other than the garbage system tool that Apple has given you, otherwise, it will also quarantine the contents. 

To allow the plugin to load normally :

  • Firstly, see the "Good Practice" suggestion at the bottom of this page.

  • Open the Mac System Preferences – Security and Privacy, while Cinema4D is loading.
  • When a warning window pops up, like “demearth4_R20.xlib ” cannot be opened because the developer cannot be verified. Proceed as follows:
  1. Click on Cancel
  2. In the System Preferences – Security and Privacy, click "Allow Anyway". 
  3. Repeat this for all issued warnings.
  4. Close Cinema4D and run it again. This time, when you get the warnings, click "Open"
  5. The plugin will now load normally, without issuing any further warnings.

note: if you get an update for your plugin, the *.xlib file will have changed, and you will need to repeat the above process.

Good Practice

Note that the zip file contains 3 (or more) binary *.xlib files.

C4D tries to load all of those xlib files. It has to load them to determine which API each one can work in. At this point MACOS tells you that the developer cannot be verified. You can safely delete the versions you don't need (keep a backup of the original zip though)  That way it will only ask once and not 3 times !


your running in R23,24. You can delete the R20 and the R21 xlib files.

your running in R21,22. You can delete the R20 and the R23 xlib files.

your running in R20. You can delete the R21 and the R23 xlib files.

That way you only have to allow one file instead of 3.


S versions run from the previous R version.


S24, uses the R23 build.

S22 uses the R21 build.

R22 uses the R21 build.

R20 is the old license system (11 numbers)

Thank Maxon for this madness!