I converted Shady Lagoon to a residential lot (I hope it's indeed lot 10, because in the SimPe I see only the name).
I am not familiar with Mac-PC relations - if you have a PC, you have to copy/paste the lot in: My Documents/Electronic Arts/Neighbourhoods/N001/Lots (save the original lot in case you have troubles), restart computer (Securom), and enter the game to see the lot. It is still with the tents of the other casaways.
I uploaded the lot here. I hope it'll help.