how do I make a deskstop shortcut for the Sims 4?

1. Navigate to this folder: programs(x86)\Origin_Games\thesims4\game\bin (path may vary depending on your installation)
2. there you see a file called ts4 or ts4.exe. 
3. Right click on that file and choose Send To .. Desktop
4. This will create a short called ts4.exe on your desktop
5. You can then rename the shortcut on the desktop by clicking on it until the text is highlighted.

Notice that if you use a 64bit version of Windows you can instead create a shortcut to ts4_x64.exe. This can improve performance. Notice that if you have less than 4GB of RAM (very unlikely) you should run the 32 bit version (ts4.exe) regardless of if Windows is 64bit.

TS4.exe will start the 64 bit version if you have it set to 64 bit in Origin

That is correct. However you can save a little (very little) on load time as ts4.exe must invoke ts4_x64.exe.

Hi, when I do that a window pops up saying there's a system error. It says that Core/Activation64.dll is missing from my computer.

And it works if you start it through Origin ?

I can't find this file, programs(x86)\Origin_Games\thesims4\game\bin .

It is not a file but a folder and you are probably looking for C:\Program Files (x86)\Origin Games\The Sims 4\Game\Bin unless you play on a Mac.

I'm playing on a Mac how would I find this on there