[klmc29]

Hi. I have Sims 2 Nightlife, Family Fun Stuff, Seasons and Open for Business. I found a website where you can swap games so I have made a commitment to swap Seasons for University.
Here's my problem: I have a Mac and have to keep my disc in the drive in order to play ( I had Seasons in there ). Since I'm swapping Seasons, I had to take it out, so I put Open for Business back in and when I try to start the game it keeps saying, "Insert Sims 2 Seasons or press quit". I've tried inserting Family Fun Stuff also to see if that will work and it won't. What am I doing wrong? I have uninstalled Seasons so why is it still recognizing that I have it?
Thanks in advance!!