Oh, those kittens again. :)
The OP doesn't have any EPs, or they have ITF only, as per a prior thread. Therefore, they might have a bit more leeway as to how much CC and which mods their game can carry. Unlike game utilities, which are programs, mods are cross-platform. They work the same way on Macs as they do on Windows.
For some reason, I tend to be partial to mods from a place called NRaas.
StoryProgression - of course
MasterController - offers menus of commands through which you can fix things that have gone wrong on demand, and offers a more flexible verison of CAS
Overwatch, ErrorTrap, Register, GoHere, Traffic - to kill various kinds of bugs and glitches
Relativity - adjusts the way time passes relative to the game clock so your sims can get more (or less) done each day
Traveler - Don't let your sims leave their homeworld without it
Saver - Doesn't auto-save, but instead puts up regularly scheduled reminders, totally adjustable, for you to save yourself and suggests a Save As name that is slightly different from the one before so you have multiple safe points to revert to should that be needed.
http://nraas.wikispaces.com/Getting+Started+Using+NRAAS+Mods
I'll let others tell you where to go shopping for CC as we all have different tastes.
