Service Initialisation Failed (0x0175dcbb)

Hi @Jemimah5529

I think you need to follow this steps made by @EA_Tom from this troubleshooting guide for MAC http://answers.ea.com/t5/The-Sims-Mac/MAC-Origin-Troubleshooting-and-Information/td-p/5371659 maybe helps you.

My Opinion is no more important or right than yours.I'm a gamer like you, trying to help you (i'm not an EA employee).

If you want to know us or/and come up with ideas to improve the Origin platform or/and talk about anything and many more besides,you could also visit the NEW section Origin General Discussion http://answers.ea.com/t5/General-Discussion/bd-p/origin-general-discussion-en

Ok @Jemimah5529

Check this thread https://answers.ea.com/t5/The-Sims-3/unable-to-start-game-service-initialization-failed-0x0175dcbb/td-p/1052190  maybe what the @crinrict posted helps you.

My Opinion is no more important or right than yours.I'm a gamer like you, trying to help you (i'm not an EA employee).

If you want to know us or/and come up with ideas to improve the Origin platform or/and talk about anything and many more besides,you could also visit the NEW section Origin General Discussion http://answers.ea.com/t5/General-Discussion/bd-p/origin-general-discussion-en

@Jemimah5529

moved this to the Sims Mac forum for better help although I'm unsure if @Bluebellflora can help with Medieval 

@Jemimah5529

I don't play Sims Medieval but I do know that EA used Cider to make it Mac compatible. Cider was a tool used to 'wrap' the Windows version of the Sims 3 so it would run in macOS, it was never natively written for Macs. Unfortunately this created a lot of the gameplay issues, one of which is the error message you are describing. For Sims 3 I would suggest completely uninstalling and reinstalling again. Whilst I haven't written instructions on how to do this thoroughly for Medieval, the locations will be the same for it I should imagine. Read through this guide and look in the same locations for Medieval files.

The other issue you will have is that your Mac is much newer than the game and as a result is running an unsupported version of macOS and has an unsupported graphics chip - Intel Iris 550. You can manually add the Intel Iris to the game files to see if that helps. Again, I have no guide for Medieval but the Sims 3 equivalent will point you in the right direction 🙂