I figured it out. Stu was right. It appears once the Envoy was set up using the windows version of Weatherlink Software (with the external sensors reselected), I was able to plug the Envoy back into the mac under WeatherCat and the sensors showed up valid. All working, I'm good for now.
![Rock On [rockon]](https://athena.trixology.com/Smileys/default/rockon.gif)
Some notes:
Weatherlink for mac setup pref pages provided the same setup pages for the 8 channels that Weatherlink for windows did, however WL for mac did not ever log them or show current conditions for them. Davis said it wouldn't.
WL for windows didn't show current conditions for them but DID allow for graphing them. WL for windows allows 3 ext temps, or 2 ext temps and one temp/hum, or 1 ext temp and 2 temp/hums. (and solar, UV, lots of leaf moisture & soil, etc which I'm not concerned with now)
Beyond that it appears one would have to move up to a Envoy8X to log as many as 8 temp externals (well maybe 7 and an ISS), but the method to graph them with WL is still clunky with that Transfer Utility method. I saw in the WL menus a selection for 'Import from Envoy8X', but if WL is only able to graph 3 anyway without exporting to another app each time....

It is likely WC can handle 8 ext temps but it is not known. If all I have to do is set up an Envoy8X in WL and then plug it into a mac under WC, I'm interested. An expensive 'maybe' but I might try sometime.... A fresh separate post if I do.
Thanks for all your help and posts I really feel welcome.