If you are struggling with Atmosphere's Intel wrapper and it's not finding the .dat file on load in Protools etc. the solution is here.
Although Spectrasonics make it clear you need to install the AU host as well as your specific host for the wrapper to work, they do not make it clear that the .dat file or its alias must reside in both the host specific folder and the AU folder. If it's missing from the AU folder your wrapper will not work.
So to be clear (because Spectrasonics don't) the .dat or alias MUST BE installed in the AU host as well as the specific host folders.
This may save someone the 4 hours I spent figuring it out.