Wow, look at that. I didn't know that was even possible! The game is starting just fine now, guess it's time to get back my mods and Awesomemod.
Thank you guys! Now I just have to figure out how to get FLS and Ambitions back..

How do you suggest I go around the launcher? By launching an .exe file on a Mac?

Sorry, I should've elaborated.
I did find it. Downloaded it and put it in my Mods-folder in ~/Documents/Electronic Arts/The Sims 3/Mods/Packages , but it doesn't work. Seems like the supplied crack is bad as well, a lot of Mac users complain about it on TPB.

Okay, progress!
http://forums.thesimsresource.com/showthread.php?t=386736

Okay, so my game starts. I get the launcher. No problems, so I try to start it. BAM. Motherfucking warning. No valid disk. What do I do? I look for Twallans No-CD mod. Nothing. Try Awesomemod. Nothing.
So I guess I'm back to square one. I got rid of the launching problem by removing both Ambitions and FLS, but now I can't start the game.
Any suggestions?

Sorry myspip, but that's nowhere related to my problem. Same goes for borsco.

I have removed all cracks and replaced them with the original versions, but I still can't start the game, so I'm still stuck. Looks like there's a few others with the same problems as well.

Okay guys, let me walk you through what I've spent the last three hours trying to do:

First, basic information about my setup
1. I'm running Mac OS X Snow Leopard 10.6.4.
2. I have enough RAM, decent enough CPU and good enough GPU. Nothing to worry about.
3. I've Googled like a bitch and now I'm tired of it.
4. I have TS3 base game, WA, HELS, Ambitions and Fast Lane installed.
5. I got hold of Late Night, reloaded version.
6. I did have Awesomemod installed earlier, removed it before starting the game.

I then proceeded to install Late Night, after downloading it. Nothing spectacular here, so read on.
Game was working fine up until this point, so I thought that this would work perfectly and went ahead with the installation.
Successfully installed Late Night, and added the new TS3EP3.exe and TSLHost.dll files. Still no explosions, so I went to start the game.
BAM. Warning dialouge pops up. Says that an "Unexpected Error Occurred". Press OK. Game terminates.
I start to investigate. Remove cache-files. Remove Preference files. Remove Mods.
Still nothing. Start to check Console with all the logs. Find this;
27.10.10 18.36.32 cider[2338] InitBusinessLogicEngine failed : 3
Google InitBusinessLogicEngine. Find out it's a dead end.
Renamed my entire The Sims 3 folder in Documents. Still nothing.
Repaired disk permissions. Created new user account. Tried to install Late Night on a clean TS3 Base Game install I have in another folder. Still nothing.

Now I'm at a loss. I have no idea what to try next - and I've reinstalled the game 5 times already, so don't suggest that unless it'll fix all my problems and create world peace.
Any ideas?

Edit and additional information:
Okay, this is really FUBAR now. I tried to install The Sims 3 on another hard drive, and after installing Fast Lane Stuff I get the same goddamn error. I mean, what the hell can I do? Seems like some people over at TheSims3.com struggle with the same as I;
http://forum.thesims3.com/jforum/posts/list/282059.page