Link aggregation on eMac running OS 10.5.8?

Hello All,

Has anyone successfully setup ethernet ‘link aggregation’ in OS 10.5.8?

So far, I’ve been failing consistently in trying this, on a couple of old eMacs, specifically two of these models:

I’m trying this with actual Apple USB adapters, specifically one of these in each eMac that I have:

I’ve been following Apples directions for doing so, as detailed here:

However, OS 10.5.8 doesn’t seem to picking up or recognizing the USB/ethernet adapter that’s plugged into a local USB port on the side of the eMac?

So far, I’ve managed to successfully set up link aggregation on my switches, but the problem seems to be with each eMac.

… somewhat baffled, here.