Disc Authorization Error - On and Off

[melodymira66]

These days, I've been getting quite a bit of "Disc Authorization Failure" messages when opening the game. I've googled for the answer, I ended up deleting all my custom content from the packages file at one point, I googled some more, I even changed the settings on CrossOver (emulation service). It still pops up.
I've been getting the message for a long time now, but for some reason, it's not there every time. Sometimes I'll get into the game great, no problem. I mean, the game generally works great when it is running smoothly. But sadly, around 7/10 times I load the game it'll tell me "Disc Authorization Failure" and I have to quit the game, and load it up again. Most of the time I'll take out the disc and put it back in, but that never seems to work. It's almost sort of a chance thing, is it going to work or not this time?
I also saw a lot of answers on Google saying "disable DLA" but I don't believe there is DLA or whatever on Macs, so that's obviously not it. And YES, it's a legitimate version that I paid for. One or two minor scratches on the disc, nothing serious.

I have a late 2011 MacBook Pro:
Processor 2.4 GHz Intel Core i5
Memory 4 GB 1333 MHz DDR3
Graphics Intel HD Graphics 3000 384 MB

It is also running Lion, and runs the game quite smoothly when I'm in the game and it's working.

[iheartcowcapoos]

i have had the same problem every now and then since installing pets. i've searched as well and haven't been able to figure out what causes it. it will keep doing it no matter how many times i try to restart the game until i restart my computer entirely. it makes me mad because, like you, i paid for all of my games. if i paid for something, it's quite rude to be accused of stealing! =P mine doesn't happen too often though, just every now and then. i hope someone can find a solution for this soon! i'm just hoping maybe it will go away once i install a new game, since it started when i installed pets and i haven't installed in EPs or SPs since. maybe it's just a pets glitch?

[simsample]

Try some of the suggestions here:
http://forum.thesims3.com/jforum/posts/list/482235.page

[melodymira66]

Try some of the suggestions here:
http://forum.thesims3.com/jforum/posts/list/482235.page

Thanks Simsample, sadly this isn't the first time this error has popped up. Actually, it went away for a long time and wasn't a problem. It turns out Crossover was the error my first time. Found that out after trying all of EA's solutions. I'm going to try the solution by clicking through the first few seconds of the intro, and see what happens.
I'd like to note, it doesn't happen *all* the time. It's only some of the time, I just wanted to see if there was a fix.
Just wondering, will holding the computer vertically affect anything?

[napoleonwrasse]

I had the same problem, so I tried twallans no CD mod which also skips the launcher and have had no problems since.