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Also the expansion has to be installed to /Applications/TheSims3
Did you also check the system requirements against your computer? Your graphics card may not be supported and that could be what's causing problems
Mac System Requirements
OS: Mac OS X 10.5.7 Leopard or higher
CPU: Intel Core Duo Processor
RAM: 2 GB RAM
DISC DRIVE: DVD
HARD DRIVE: At least 3.5 GB* of free space with at least 1 GB of additional space for custom content and saved games.
VIDEO: ATI X1600 or NVIDIA 7300 GT with 128 MB of Video RAM
INPUT: Keyboard, mouse
*9.6 GB of hard drive space if installing with The Sims 3
Supported Video Cards: Nvidia GeForce 6 series or better, and all NVidia G, GT, GTS, and GTX video cards. ATI Radeon™ series card 9500 series or better, and all ATI X, X1, and HD video cards. Please note that the GeForce 6100 and 7100 cards are not supported. The NVIDIA GeForce 7300 series is unsupported under Snow Leopard. This game will not run on PowerPC (G3/G4/G5) based Mac systems, or the GMA 950 class of integrated video cards.
Another thing to try is a program called CCleaner which should clean off your RAM cache which is another possible thing preventing a disk verification.
Disk defragmentation might also be necessary (though Mac's are usually good about that unlike Windows since it uses HFS+)
- 12 years ago
Well, I don't have the digital copy on my mac - origin wasn't compatible with 10.5.8, but the add on is in /Applications/TheSims3. Looks like the requirements are all met as well. I made sure there was plenty of room on the harddrive before installing, and everything else adds up. Graphic card looks good.
I did try playing again about a half hour after the disk authentication message came up, and it worked. It might just be one of those glitches that doesn't really have a clear explanation. As far as I can tell, the disk is fine, the computer is fine, but there's still a problem...
I'll keep the CCleaner in mind, thank you!- rumbutter12 years agoHero (Retired)
see if this will help you http://sims3.crinrict.com/en/2011/09/error-disc-authentication-error.html
- 12 years ago
All good suggestions - thank you! - but my disk is practically brand new and the dvd drive works for other games and for cds. My friend who also has a macbook and has different, newer add ons has the same problem occasionally she said. I'm starting to think there isn't going to be a permanent, definitive solution.
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