@amandav101 I take it after your most recent clean uninstall, you've installed the base game only, no packs? (If that's not the case, please do another clean uninstall and reinstall only the base game.) Please also run the Super Patch again, if you haven't since this latest install. Running it later will undo the .sgr edits (as will letting the launcher patch), which is why the order is important.
Speaking of those edits, you'll need the ones for your Intel Iris 5100. Your deviceconfig shows the card isn't currently recognized, so you'll need to edit both graphicscards.sgr and graphicsrules.sgr to add the relevant text. You can find it here:
https://bluebellflora.com/2018/07/24/sims-3-mac-players-i-need-your-help/#Filesconfirmed
Once you've done this, restart your computer, and don't open anything aside from Sims 3. You don't even need Origin—just launch the game from Applications.
If it doesn't work, try bypassing the launcher.
https://bluebellflora.com/sims-3-how-to-bypass-the-launcher-on-a-mac/
If none of this works, please check deviceconfig again, and let me know whether it shows the current [Found: 0, Matched: 1], or it now has a Found: 1 value.
@amandav101 Your Mac has an Intel Iris 5100; I looked it up. There's an entry specifically for the 5100 on the page I linked earlier.
@amandav101 Okay, let's try tweaking the graphicscards.sgr edit a bit. Where you see this:
card 0x0A2E "4th Gen Intel(R) Core processor graphics HD 5100 Iris - Mobile Haswell - ULT GT3"
Highlight the quoted text (don't highlight the quotes, just leave them), and command-x to delete it. Then highlight this:
Intel(R) Iris Graphics 5100
cmd-c to copy, and cmd-v to paste it between the quotes. It's important to copy, not to type, because the quotation marks will change to a different kind (one that the game can't read) if you type anything anywhere near them. If that happens, or you're not sure whether it did, just copy the quote marks from the first line above. Save and quit.
Now open graphicsrules.sgr, and cmd-F to search for 5100. You'll see this:
elseif (match("${cardName}", "*IntelHD5100Iris*"))
seti cardLevel $cardLevelMedium
seti isCardMatched true
Replace the part inside the asterisks (IntelHD5100Iris) with this:
Iris Graphics 5100
Leave all the punctuation, including the asterisks, intact.
Save your work, quit, restart your computer, and try to launch the game. Please let me know what found and matched values your deviceconfig has after this.
The service initialization error isn't better or worse, it's the same, just what you'd see if you hadn't solved the unknown error.
