@wassup573 If you're on a budget, you really don't want to buy a Mac for TS3. I love Macs—I'm typing on one right now—but the cheaper varieties don't come with the hardware to run TS3 properly. For a laptop, you'd need a 15" MacBook Pro to get a dedicated graphics card capable of running the most demanding packs on high graphics settings. The iMacs are a better bet; the current highest-end 21.5" model and all of the 27" ones have hardware that would handle the game just fine.
However, these models are all more expensive than their Windows counterparts with the same hardware. I would never discourage anyone who wants one from buying a Mac, but someone with budget constraints may need to consider the significant price difference. You could probably find a Windows desktop that would run the entire game for under $800 U.S. (prices will vary in other countries), and a laptop with sufficient specs might be $100 more.
None of this even takes into account that TS3 doesn't run nearly as well in Mac OS as it does in Windows. The game is a mess to get installed, but more relevantly, it can only use a maximum of 2 GB RAM before crashing, as opposed to ~3.7 GB in Windows. This is due to the way TS3 was ported into Mac OS, and the memory constraint can't be overcome. Some people can live with the RAM limit, but many of us have decided that the only way to play properly is to partition our hard drives and install Windows. (This is known as Bootcamping.) It's certainly doable, and the setup isn't all that hard to maintain. But if the point is to play TS3, it's just one more annoyance that's only necessary on a Mac.
If you'd like some help picking out a computer, list your budget and country, as well as any other features you'd like the computer to have (do you in fact want to buy a Mac, do you want a laptop or desktop, etc.) It might be better to post in the dedicated thread for new members, especially if you're not interested in a Mac anymore, but we'll find your post regardless.
https://forums.thesims.com/en_US/discussion/893122/thread-for-new-members-to-post-their-sims-3-game-issues#latest