Okay, for anyone having difficulty with making the Sims 2 work or not understanding how to use the patches & updates, this is how I did it:
Go to
http://support.aspyr.com/ and click the "Quicktime 7.6 fixes" link. When the next page loads, click on The Sims 2, or if you have any expansion packs, the last expansion pack you installed on your computer. In the "PROBLEM" box, click the link towards the bottom to get to the patch page. Click on the macgamefiles link, because it downloads slightly faster than the other one. Now if you don't have any expansion packs, click "The Sims 2 (Rev F Patch)." If you do, however, click "The Sims 2 Combo Patch." If you downloaded the second one, it can take quite a long time to download. While you're waiting, go back to the page with the Quicktime 7.6 fix. If you don't remember where that was, or exited the window, go back to
http://support.aspyr.com/, click the "Quicktime 7.6 fixes" link, and select your game again. Now in the "SOLUTION" box, click the link. Now wait for both items to download. Once both files have finished downloading, open the first one (the patch) and click on the installer and follow the directions. Next, open the second file (the update), and drag the new Sims 2 icon to your Sims 2 folder. THIS STEP IS VERY IMPORTANT! A box should pop up, asking if you want to replace the Sims 2. Click yes, and double click on the new icon in your Sims 2 folder. Now, a box will pop up and you'll have to wait just a few more minutes. When the game opens, the resolution will be wrong, so you'll probably want to fix it in the display options.
Hope this helps! Good luck!