I bought The Sims 3 in 2010, when it installed with EADM, I play a family for a few weeks at longish intervals.
I bought Battlefield 3 recently, and Origin replaced EADM.
Now getting back into TS3 and trying to install an expansion pack, the TS3 launcher says I need EADM.
The solution says Origin replaced EADM. I already have Origin. I logged in. Same result: the TS3 launcher says I have to have EADM and I don't. I try the EADM link from the thread. Origin's replaced it there too.
So I uninstall The Sims 3 and re-download it through Origin and install it.
This fresh install of TS3 says I need EADM.
So maybe I can just ignore that and do everything through Origin, which has replaced EADM?
Nope: I try to install Late Night, it says "Please use The Sims 3 Launcher and update your version of The Sims 3 before installing this product".
Which, you'll recall from above, The Sims 3 launcher won't do, because I don't have EADM installed.