Hi an0malaus, thank you for your answer. You are correct it does not seem to be causing any issue that I have noticed. I will delve deeper. Thanks again.

Should have added, I removed the Poser Library.app and it doesn't seem to make any difference, so hopefully deleting this should solve the problem of the warning message. Also the app seems to also require Adobe Air which I think is long gone. I think it may be a legacy item which is no longer required but hasn't been removed.

The following app is 32 bit on a Mac, and can be found following this link /Applications/Poser 11/Runtime/ui/AIR/LSMGUI/Poser Library.app Clicking on this app will bring up the random warning message, see attached.

I run Poser 11 on a Mac under Mojave and I am starting to get warnings that the application will not run on future versions of the OS, I presume they mean Catalina due in the autumn of 2019 and the dropping of all 32 bit support. Having checked Poser 11 is 64 bit but the Poser Library app shows as 32 bit are updates likely to be in the pipeline now Renderosity are taking over?