There's no patch that enables nightlights to show up on custom BATs for the Mac port of this game. Sorry, I know it sucks but Aspyr clearly does not seem to care enough to actually patch their version of this game. If not having nightlights is something that really bothers you, you should consider running the Windows version of SC4 on your Mac by using a Parallels, Wine, or dual-booting to Windows with Boot Camp. You probably should take a look at the threads at the SC4 Mac Users section of this forum for more info on how to do this.
Urg, that seems like a lot of work, I checked out the wine thing when you first mention it but it seems to be too confusing to download it, I didn't understand. : (
I don't use my mac for gaming usually, I only thought it would be nice to have Simcity on my Macbook because I take it everywhere. It plays well but I just wish these little things like building lighting would work properly.
Thanks for your patience in helping me, lol, this forum seems kind of dead. : (