The Sims 4 – ‘Initialization error at start up’ [135dec40:90f690cf:00000075:495f32a0]

Update 07/04/20 – this issue has appeared again with patch but for the current version of the game, not the Legacy Edition. The workaround to fix it is in the Answers HQ thread on the issue here.

Update 25/11/19 – this issue has now been fixed in the Mac Legacy Edition patch

Mac users running High Sierra on non-Metal supported Macs are reporting that the Legacy Edition of Sims 4 will not load successfully:

Unable to start:

Initialization error at start up.


If you are getting this error there are two workarounds you can try.

Option 1:
In Origin right click/CTRL click on the Sims 4 in your Games Library, select Game Properties then Advanced Launch Options and choose English from the drop down menu:

After you have successfully loaded the game in English you should be able to switch back to your native language.

Option 2:

  1. Right click on the Sims 4 in your Applications folder and select Show Package Contents. You should now see three folders and one file in the Finder window:
  2. Click on the installer.plist file once to select it, go to Edit > Copy (or CMD and C).
  3. Open the Contents folder then the Resources folder.
  4. Right click on The Sims 4 app in the Resources folder (the one with the game icon)  and select Show Package Contents again. There should just be one folder in the Finder window called Contents.
  5. Go to Edit > Paste (or CMD and V) to paste the installer.plist file you just copied into this folder. It should look like this:
  6. You should now have the installer.plist file in two locations.

Either of these workarounds should result in a game that successfully launches. Hopefully EA will release a fix soon but in the meantime this should get you back in your game.


7 thoughts on “The Sims 4 – ‘Initialization error at start up’ [135dec40:90f690cf:00000075:495f32a0]

  1. the game works afterwards, but it doen’t go smooth in gameplay and there is no fun playing it under this conditions…

    is it just my mac or does anyone else have this problem after solving with this workaround?


      1. i got an Late 2007 iMac, the highst possile macOS, before upgrading to legacy edition the game was very smooth, afterwards it didn’t run and after the workaround it isn’t smooth anymore…

        hopefully ea releases an update soon to fix the issue


  2. I changed the language from danish to English and it made the game work. But now I can’t change it back. I’ve chosen danish and applied it to the game, but it’s still in English
    Any solutions?
    Have tried to reinstall it without succes..
    My macbook pro :
    late 2011
    processor 2.4 GHz core i5
    12 GB 1067 MHz DDR3
    disc : ssd 256
    Intel HD Graphics 3000 512 MB


  3. It’s still not working for me. That’s super frustrating. I spent all this money and have all of the packs up to University, was forced to Legacy, and now I can’t load it at all? -_-


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