Re: [CURRENT ISSUE 64-bit] Base game incompatible with expansion pack error

Can anyone please help me out, I've just downloaded the sims 3 game and the sims 3 pets on my Mac via EA. I've updated my laptop, there's no updates for the two games, I've 'repaired' them through the option on EA origin. But it keeps coming up with and error message saying:
"Unable to start game. Your The Sims 3 Base Game is incompatible with the current Sims 3 Expansion Pack. Please update your game via the game launcher".

I've checked so many times and there's no updates, I've literally just brought it and I am unable to play it. I have also uninstalled and reinstalled the sims pets and so success.
Please help me!

If its any information I also have the sims 4 downloaded and I've never had a problem playing that before. I've also searched if there's another Sims 3 base game I can download on origin but there is not.

Thanks in advance!