Just downloaded Sunlit Tides...

So, I just downloaded it and after it installed it says 'make sure your game is up to date etc.' And I apologise if this has been answered (many times?) already.
I've been meaning to update the base game for a while and after I presumably 'update' it, it says 'Some files have been modified, please reinstall' and I don't exactly know/understand how to (manually) update it.

If anything, I was thinking of downloading Diesel Stuff to take the hassle out of it, but I don't think my Macbook can handle anymore EP/SP/CC.

So can someone please pleaseeeee please tell me what to do now?

My game version is 12.0.273.016001

THANK YOU!!

And sorry, if I sound like a massive noob. D:

Hello,

You can download the Mac manual patch here: https://games4theworld.forumotion.com/t3597-can-t-update-the-sims-3-to-v136-fix-manual-patch
After that, you only need to re-apply the Diesel Stuff crack.

I don't have the Diesel Stuff pack though.
Does this mean I have to download it?

Hello,

No, in that case please download the Mac version of the Ultimate Fix here: https://games4theworld.forumotion.com/t752-the-sims-3-ultimate-fix-should-fix-most-of-your-problems and only do step 13 and 14.

Let us know the result and good luck!

It worked!!
Thank you.

And since we're on the topic of Diesel Stuff and EP/SP.. I actually downloaded Diesel Stuff before I patched it to see if it would work, and when trying to install it - it says i need to select the folder where the actual app is located but it doesn't let me select it? So it's faded out.
This goes for the other EP's/SP's.. I've tried installing (WA, Pets and DS, just to name a few.)
It's not major problem for me right now, but I'd just like to get it working before Supernatural and/or Seasons comes out.

PROBLEM RESOLVED.

THANK YOU AGAIN!! n____n